Finding the Fourth Proportional to 151,456,939.69, 208,974,978.54 and 91,916,916.12

Step by Step Solution

1. Step 1: Write the proportion equation
   151,456,939.69 : 208,974,978.54 = 91,916,916.12 : x
2. Step 2: Convert to fraction form
   151,456,939.69/208,974,978.54 = 91,916,916.12/x
3. Step 3: Cross multiply
   151,456,939.69x = 208,974,978.54 × 91,916,916.12
4. Step 4: Simplify right side
   151,456,939.69x = 19,208,335,573,639,980
5. Step 5: Solve for x
   x = 19,208,335,573,639,980/151,456,939.69
6. Step 6: Final answer
   x = 126,823,740.22