Finding the Fourth Proportional to 31,102.31, 42,921.50 and 16,955.46

Step by Step Solution

1. Step 1: Write the proportion equation
   31,102.31 : 42,921.50 = 16,955.46 : x
2. Step 2: Convert to fraction form
   31,102.31/42,921.50 = 16,955.46/x
3. Step 3: Cross multiply
   31,102.31x = 42,921.50 × 16,955.46
4. Step 4: Simplify right side
   31,102.31x = 727,753,691.61
5. Step 5: Solve for x
   x = 727,753,691.61/31,102.31
6. Step 6: Final answer
   x = 23,398.70