Finding the Fourth Proportional to 31,118.47, 42,941.77 and 17,687.86

Step by Step Solution

1. Step 1: Write the proportion equation
   31,118.47 : 42,941.77 = 17,687.86 : x
2. Step 2: Convert to fraction form
   31,118.47/42,941.77 = 17,687.86/x
3. Step 3: Cross multiply
   31,118.47x = 42,941.77 × 17,687.86
4. Step 4: Simplify right side
   31,118.47x = 759,548,015.91
5. Step 5: Solve for x
   x = 759,548,015.91/31,118.47
6. Step 6: Final answer
   x = 24,408.27