Finding the Fourth Proportional to 22,615.82, 31,209.91 and 12,545.18

Step by Step Solution

1. Step 1: Write the proportion equation
   22,615.82 : 31,209.91 = 12,545.18 : x
2. Step 2: Convert to fraction form
   22,615.82/31,209.91 = 12,545.18/x
3. Step 3: Cross multiply
   22,615.82x = 31,209.91 × 12,545.18
4. Step 4: Simplify right side
   22,615.82x = 391,533,751.32
5. Step 5: Solve for x
   x = 391,533,751.32/22,615.82
6. Step 6: Final answer
   x = 17,312.39