Finding the Fourth Proportional to 31,120.47, 42,944.53 and 17,689.86

Step by Step Solution

1. Step 1: Write the proportion equation
   31,120.47 : 42,944.53 = 17,689.86 : x
2. Step 2: Convert to fraction form
   31,120.47/42,944.53 = 17,689.86/x
3. Step 3: Cross multiply
   31,120.47x = 42,944.53 × 17,689.86
4. Step 4: Simplify right side
   31,120.47x = 759,682,723.47
5. Step 5: Solve for x
   x = 759,682,723.47/31,120.47
6. Step 6: Final answer
   x = 24,411.03