Finding the Fourth Proportional to 31,385.30, 43,311.69 and 17,238.13

Step by Step Solution

1. Step 1: Write the proportion equation
   31,385.30 : 43,311.69 = 17,238.13 : x
2. Step 2: Convert to fraction form
   31,385.30/43,311.69 = 17,238.13/x
3. Step 3: Cross multiply
   31,385.30x = 43,311.69 × 17,238.13
4. Step 4: Simplify right side
   31,385.30x = 746,612,434.46
5. Step 5: Solve for x
   x = 746,612,434.46/31,385.30
6. Step 6: Final answer
   x = 23,788.61