Finding the Fourth Proportional to 31,099.50, 42,918.42 and 17,671.32

Step by Step Solution

1. Step 1: Write the proportion equation
   31,099.50 : 42,918.42 = 17,671.32 : x
2. Step 2: Convert to fraction form
   31,099.50/42,918.42 = 17,671.32/x
3. Step 3: Cross multiply
   31,099.50x = 42,918.42 × 17,671.32
4. Step 4: Simplify right side
   31,099.50x = 758,425,133.71
5. Step 5: Solve for x
   x = 758,425,133.71/31,099.50
6. Step 6: Final answer
   x = 24,387.05