Finding the Fourth Proportional to 123,399.92, 170,262.62 and 71,686.25

Step by Step Solution

1. Step 1: Write the proportion equation
   123,399.92 : 170,262.62 = 71,686.25 : x
2. Step 2: Convert to fraction form
   123,399.92/170,262.62 = 71,686.25/x
3. Step 3: Cross multiply
   123,399.92x = 170,262.62 × 71,686.25
4. Step 4: Simplify right side
   123,399.92x = 12,205,488,742.98
5. Step 5: Solve for x
   x = 12,205,488,742.98/123,399.92
6. Step 6: Final answer
   x = 98,910.02