Finding the Fourth Proportional to 123,528.38, 170,449.79 and 71,856.92

Step by Step Solution

1. Step 1: Write the proportion equation
   123,528.38 : 170,449.79 = 71,856.92 : x
2. Step 2: Convert to fraction form
   123,528.38/170,449.79 = 71,856.92/x
3. Step 3: Cross multiply
   123,528.38x = 170,449.79 × 71,856.92
4. Step 4: Simplify right side
   123,528.38x = 12,247,996,990.89
5. Step 5: Solve for x
   x = 12,247,996,990.89/123,528.38
6. Step 6: Final answer
   x = 99,151.28