Finding the Fourth Proportional to 1,281,418,857.72, 1,768,426,685.01 and 716,870,061.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,281,418,857.72 : 1,768,426,685.01 = 716,870,061.50 : x
2. Step 2: Convert to fraction form
   1,281,418,857.72/1,768,426,685.01 = 716,870,061.50/x
3. Step 3: Cross multiply
   1,281,418,857.72x = 1,768,426,685.01 × 716,870,061.50
4. Step 4: Simplify right side
   1,281,418,857.72x = 1,267,732,146,432,517,632
5. Step 5: Solve for x
   x = 1,267,732,146,432,517,632/1,281,418,857.72
6. Step 6: Final answer
   x = 989,319,096.40