Finding the Fourth Proportional to 31,638.08, 43,658.82 and 17,490

Step by Step Solution

1. Step 1: Write the proportion equation
   31,638.08 : 43,658.82 = 17,490 : x
2. Step 2: Convert to fraction form
   31,638.08/43,658.82 = 17,490/x
3. Step 3: Cross multiply
   31,638.08x = 43,658.82 × 17,490
4. Step 4: Simplify right side
   31,638.08x = 763,592,761.80
5. Step 5: Solve for x
   x = 763,592,761.80/31,638.08
6. Step 6: Final answer
   x = 24,135.25