Finding the Fourth Proportional to 31,113.83, 42,939.63 and 17,689.29

Step by Step Solution

1. Step 1: Write the proportion equation
   31,113.83 : 42,939.63 = 17,689.29 : x
2. Step 2: Convert to fraction form
   31,113.83/42,939.63 = 17,689.29/x
3. Step 3: Cross multiply
   31,113.83x = 42,939.63 × 17,689.29
4. Step 4: Simplify right side
   31,113.83x = 759,571,567.56
5. Step 5: Solve for x
   x = 759,571,567.56/31,113.83
6. Step 6: Final answer
   x = 24,412.67