Finding the Fourth Proportional to 128,494,414.14, 177,344,940.15 and 72,743,018.10

Step by Step Solution

1. Step 1: Write the proportion equation
   128,494,414.14 : 177,344,940.15 = 72,743,018.10 : x
2. Step 2: Convert to fraction form
   128,494,414.14/177,344,940.15 = 72,743,018.10/x
3. Step 3: Cross multiply
   128,494,414.14x = 177,344,940.15 × 72,743,018.10
4. Step 4: Simplify right side
   128,494,414.14x = 12,900,606,191,274,866
5. Step 5: Solve for x
   x = 12,900,606,191,274,866/128,494,414.14
6. Step 6: Final answer
   x = 100,398,186.78