Finding the Fourth Proportional to 57,499.80, 86,147.12 and 31,187.76

Step by Step Solution

1. Step 1: Write the proportion equation
   57,499.80 : 86,147.12 = 31,187.76 : x
2. Step 2: Convert to fraction form
   57,499.80/86,147.12 = 31,187.76/x
3. Step 3: Cross multiply
   57,499.80x = 86,147.12 × 31,187.76
4. Step 4: Simplify right side
   57,499.80x = 2,686,735,703.25
5. Step 5: Solve for x
   x = 2,686,735,703.25/57,499.80
6. Step 6: Final answer
   x = 46,726.00