Finding the Fourth Proportional to 22,856.69, 31,545.15 and 12,785.69

Step by Step Solution

1. Step 1: Write the proportion equation
   22,856.69 : 31,545.15 = 12,785.69 : x
2. Step 2: Convert to fraction form
   22,856.69/31,545.15 = 12,785.69/x
3. Step 3: Cross multiply
   22,856.69x = 31,545.15 × 12,785.69
4. Step 4: Simplify right side
   22,856.69x = 403,326,508.90
5. Step 5: Solve for x
   x = 403,326,508.90/22,856.69
6. Step 6: Final answer
   x = 17,645.88