Finding the Fourth Proportional to 31,073.47, 42,879.90 and 17,642.96

Step by Step Solution

1. Step 1: Write the proportion equation
   31,073.47 : 42,879.90 = 17,642.96 : x
2. Step 2: Convert to fraction form
   31,073.47/42,879.90 = 17,642.96/x
3. Step 3: Cross multiply
   31,073.47x = 42,879.90 × 17,642.96
4. Step 4: Simplify right side
   31,073.47x = 756,528,146.10
5. Step 5: Solve for x
   x = 756,528,146.10/31,073.47
6. Step 6: Final answer
   x = 24,346.43