Finding the Fourth Proportional to 117,105.96, 161,606.78 and 63,391.02

Step by Step Solution

1. Step 1: Write the proportion equation
   117,105.96 : 161,606.78 = 63,391.02 : x
2. Step 2: Convert to fraction form
   117,105.96/161,606.78 = 63,391.02/x
3. Step 3: Cross multiply
   117,105.96x = 161,606.78 × 63,391.02
4. Step 4: Simplify right side
   117,105.96x = 10,244,418,623.12
5. Step 5: Solve for x
   x = 10,244,418,623.12/117,105.96
6. Step 6: Final answer
   x = 87,479.91