Finding the Fourth Proportional to 55,139.31, 82,697.67 and 15,685.83

Step by Step Solution

1. Step 1: Write the proportion equation
   55,139.31 : 82,697.67 = 15,685.83 : x
2. Step 2: Convert to fraction form
   55,139.31/82,697.67 = 15,685.83/x
3. Step 3: Cross multiply
   55,139.31x = 82,697.67 × 15,685.83
4. Step 4: Simplify right side
   55,139.31x = 1,297,181,593.02
5. Step 5: Solve for x
   x = 1,297,181,593.02/55,139.31
6. Step 6: Final answer
   x = 23,525.53