#### Answer

a. $923,187,500$
b. $923,187,000$
c. $923,200,000$
d. $923,000,000$
e. $900,000,000$

#### Work Step by Step

Rounding $923,187,456$ to the nearest:
a. hundred
$923,187,500$
(The tens digit is 5, so we increase the hundreds digit by 1 and replace the ones behind it with 0).
b. thousand
$923,187,000$
(The hundreds digit is 4, so we keep the thousands digit the same and replace the ones behind it with 0).
c. hundred thousand
$923,200,000$
(The ten thousands digit is 8, so we increase the hundred thousands digit by 1 and replace the ones behind it with 0).
d. million
$923,000,000$
(The hundred thousands digit is 1, so we keep the millions digit the same and replace the ones behind with 0).
e. hundred million
$900,000,000$
(The ten millions digit is 2, so we keep the hundred millions digit the same and replace the ones behind it with 0).