Finding the Fourth Proportional to 31,116.12, 42,942.12 and 17,687.88

Step by Step Solution

1. Step 1: Write the proportion equation
   31,116.12 : 42,942.12 = 17,687.88 : x
2. Step 2: Convert to fraction form
   31,116.12/42,942.12 = 17,687.88/x
3. Step 3: Cross multiply
   31,116.12x = 42,942.12 × 17,687.88
4. Step 4: Simplify right side
   31,116.12x = 759,555,065.51
5. Step 5: Solve for x
   x = 759,555,065.51/31,116.12
6. Step 6: Final answer
   x = 24,410.34