Finding the Fourth Proportional to 129,945.60, 179,322.98 and 72,585.86

Step by Step Solution

1. Step 1: Write the proportion equation
   129,945.60 : 179,322.98 = 72,585.86 : x
2. Step 2: Convert to fraction form
   129,945.60/179,322.98 = 72,585.86/x
3. Step 3: Cross multiply
   129,945.60x = 179,322.98 × 72,585.86
4. Step 4: Simplify right side
   129,945.60x = 13,016,311,461.52
5. Step 5: Solve for x
   x = 13,016,311,461.52/129,945.60
6. Step 6: Final answer
   x = 100,167.39