Finding the Fourth Proportional to 31,057.31, 42,868.76 and 17,637.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,057.31 : 42,868.76 = 17,637.50 : x
2. Step 2: Convert to fraction form
   31,057.31/42,868.76 = 17,637.50/x
3. Step 3: Cross multiply
   31,057.31x = 42,868.76 × 17,637.50
4. Step 4: Simplify right side
   31,057.31x = 756,097,451.97
5. Step 5: Solve for x
   x = 756,097,451.97/31,057.31
6. Step 6: Final answer
   x = 24,345.24