Finding the Fourth Proportional to 31,100.85, 42,920.31 and 17,674.35

Step by Step Solution

1. Step 1: Write the proportion equation
   31,100.85 : 42,920.31 = 17,674.35 : x
2. Step 2: Convert to fraction form
   31,100.85/42,920.31 = 17,674.35/x
3. Step 3: Cross multiply
   31,100.85x = 42,920.31 × 17,674.35
4. Step 4: Simplify right side
   31,100.85x = 758,588,581.05
5. Step 5: Solve for x
   x = 758,588,581.05/31,100.85
6. Step 6: Final answer
   x = 24,391.25