Finding the Fourth Proportional to 31,007.63, 42,789.60 and 17,580.11

Step by Step Solution

1. Step 1: Write the proportion equation
   31,007.63 : 42,789.60 = 17,580.11 : x
2. Step 2: Convert to fraction form
   31,007.63/42,789.60 = 17,580.11/x
3. Step 3: Cross multiply
   31,007.63x = 42,789.60 × 17,580.11
4. Step 4: Simplify right side
   31,007.63x = 752,245,874.86
5. Step 5: Solve for x
   x = 752,245,874.86/31,007.63
6. Step 6: Final answer
   x = 24,260.02