Finding the Fourth Proportional to 945,096,921.05, 1,304,233,987.43 and 521,710,828.25

Step by Step Solution

1. Step 1: Write the proportion equation
   945,096,921.05 : 1,304,233,987.43 = 521,710,828.25 : x
2. Step 2: Convert to fraction form
   945,096,921.05/1,304,233,987.43 = 521,710,828.25/x
3. Step 3: Cross multiply
   945,096,921.05x = 1,304,233,987.43 × 521,710,828.25
4. Step 4: Simplify right side
   945,096,921.05x = 680,432,993,808,688,384
5. Step 5: Solve for x
   x = 680,432,993,808,688,384/945,096,921.05
6. Step 6: Final answer
   x = 719,961,073.47