Finding the Fourth Proportional to 139,758,018.13, 209,614,287.94 and 65,981,655.43

Step by Step Solution

1. Step 1: Write the proportion equation
   139,758,018.13 : 209,614,287.94 = 65,981,655.43 : x
2. Step 2: Convert to fraction form
   139,758,018.13/209,614,287.94 = 65,981,655.43/x
3. Step 3: Cross multiply
   139,758,018.13x = 209,614,287.94 × 65,981,655.43
4. Step 4: Simplify right side
   139,758,018.13x = 13,830,697,720,061,884
5. Step 5: Solve for x
   x = 13,830,697,720,061,884/139,758,018.13
6. Step 6: Final answer
   x = 98,961,747.63