Finding the Fourth Proportional to 128,191.01, 176,869.37 and 71,601.17

Step by Step Solution

1. Step 1: Write the proportion equation
   128,191.01 : 176,869.37 = 71,601.17 : x
2. Step 2: Convert to fraction form
   128,191.01/176,869.37 = 71,601.17/x
3. Step 3: Cross multiply
   128,191.01x = 176,869.37 × 71,601.17
4. Step 4: Simplify right side
   128,191.01x = 12,664,053,123.82
5. Step 5: Solve for x
   x = 12,664,053,123.82/128,191.01
6. Step 6: Final answer
   x = 98,790.50