Finding the Third Proportional to 272,925,762 and 390,287,061

Step by Step Solution

1. Step 1: Write the proportion equation
   272,925,762 : 390,287,061 = 390,287,061 : x
2. Step 2: Convert to fraction form
   272,925,762/390,287,061 = 390,287,061/x
3. Step 3: Cross multiply
   272,925,762x = 390,287,061 × 390,287,061
4. Step 4: Simplify right side
   272,925,762x = 152,323,989,984,017,728
5. Step 5: Solve for x
   x = 152,323,989,984,017,728/272,925,762
6. Step 6: Final answer
   x = 558,115,103.78