Finding the Fourth Proportional to 31,029.52, 42,817.52 and 18,109.20

Step by Step Solution

1. Step 1: Write the proportion equation
   31,029.52 : 42,817.52 = 18,109.20 : x
2. Step 2: Convert to fraction form
   31,029.52/42,817.52 = 18,109.20/x
3. Step 3: Cross multiply
   31,029.52x = 42,817.52 × 18,109.20
4. Step 4: Simplify right side
   31,029.52x = 775,391,033.18
5. Step 5: Solve for x
   x = 775,391,033.18/31,029.52
6. Step 6: Final answer
   x = 24,988.82