Finding the Fourth Proportional to 31,117.50, 42,943.23 and 17,689.32

Step by Step Solution

1. Step 1: Write the proportion equation
   31,117.50 : 42,943.23 = 17,689.32 : x
2. Step 2: Convert to fraction form
   31,117.50/42,943.23 = 17,689.32/x
3. Step 3: Cross multiply
   31,117.50x = 42,943.23 × 17,689.32
4. Step 4: Simplify right side
   31,117.50x = 759,636,537.30
5. Step 5: Solve for x
   x = 759,636,537.30/31,117.50
6. Step 6: Final answer
   x = 24,411.88