Finding the Fourth Proportional to 117,042,333.64, 161,518,434.42 and 64,834,750.78

Step by Step Solution

1. Step 1: Write the proportion equation
   117,042,333.64 : 161,518,434.42 = 64,834,750.78 : x
2. Step 2: Convert to fraction form
   117,042,333.64/161,518,434.42 = 64,834,750.78/x
3. Step 3: Cross multiply
   117,042,333.64x = 161,518,434.42 × 64,834,750.78
4. Step 4: Simplify right side
   117,042,333.64x = 10,472,007,441,996,474
5. Step 5: Solve for x
   x = 10,472,007,441,996,474/117,042,333.64
6. Step 6: Final answer
   x = 89,471,963.83