Finding the Fourth Proportional to 22,711.65, 31,342.98 and 12,640.52

Step by Step Solution

1. Step 1: Write the proportion equation
   22,711.65 : 31,342.98 = 12,640.52 : x
2. Step 2: Convert to fraction form
   22,711.65/31,342.98 = 12,640.52/x
3. Step 3: Cross multiply
   22,711.65x = 31,342.98 × 12,640.52
4. Step 4: Simplify right side
   22,711.65x = 396,191,408.83
5. Step 5: Solve for x
   x = 396,191,408.83/22,711.65
6. Step 6: Final answer
   x = 17,444.41