Finding the Fourth Proportional to 31,834.72, 43,931.46 and 17,687.20

Step by Step Solution

1. Step 1: Write the proportion equation
   31,834.72 : 43,931.46 = 17,687.20 : x
2. Step 2: Convert to fraction form
   31,834.72/43,931.46 = 17,687.20/x
3. Step 3: Cross multiply
   31,834.72x = 43,931.46 × 17,687.20
4. Step 4: Simplify right side
   31,834.72x = 777,024,519.31
5. Step 5: Solve for x
   x = 777,024,519.31/31,834.72
6. Step 6: Final answer
   x = 24,408.08