Finding the Fourth Proportional to 31,128.49, 42,957.33 and 17,699.41

Step by Step Solution

1. Step 1: Write the proportion equation
   31,128.49 : 42,957.33 = 17,699.41 : x
2. Step 2: Convert to fraction form
   31,128.49/42,957.33 = 17,699.41/x
3. Step 3: Cross multiply
   31,128.49x = 42,957.33 × 17,699.41
4. Step 4: Simplify right side
   31,128.49x = 760,319,396.18
5. Step 5: Solve for x
   x = 760,319,396.18/31,128.49
6. Step 6: Final answer
   x = 24,425.19