Finding the Fourth Proportional to 101,359.80, 139,104.42 and 93,311.64

Step by Step Solution

1. Step 1: Write the proportion equation
   101,359.80 : 139,104.42 = 93,311.64 : x
2. Step 2: Convert to fraction form
   101,359.80/139,104.42 = 93,311.64/x
3. Step 3: Cross multiply
   101,359.80x = 139,104.42 × 93,311.64
4. Step 4: Simplify right side
   101,359.80x = 12,980,061,561.45
5. Step 5: Solve for x
   x = 12,980,061,561.45/101,359.80
6. Step 6: Final answer
   x = 128,059.27