Finding the Fourth Proportional to 123,498.38, 170,326.32 and 75,718.10

Step by Step Solution

1. Step 1: Write the proportion equation
   123,498.38 : 170,326.32 = 75,718.10 : x
2. Step 2: Convert to fraction form
   123,498.38/170,326.32 = 75,718.10/x
3. Step 3: Cross multiply
   123,498.38x = 170,326.32 × 75,718.10
4. Step 4: Simplify right side
   123,498.38x = 12,896,785,330.39
5. Step 5: Solve for x
   x = 12,896,785,330.39/123,498.38
6. Step 6: Final answer
   x = 104,428.78