Finding the Fourth Proportional to 31,065.86, 42,872.11 and 17,638.37

Step by Step Solution

1. Step 1: Write the proportion equation
   31,065.86 : 42,872.11 = 17,638.37 : x
2. Step 2: Convert to fraction form
   31,065.86/42,872.11 = 17,638.37/x
3. Step 3: Cross multiply
   31,065.86x = 42,872.11 × 17,638.37
4. Step 4: Simplify right side
   31,065.86x = 756,193,965.54
5. Step 5: Solve for x
   x = 756,193,965.54/31,065.86
6. Step 6: Final answer
   x = 24,341.64