Finding the Fourth Proportional to 22,587.87, 31,170.89 and 12,516.28

Step by Step Solution

1. Step 1: Write the proportion equation
   22,587.87 : 31,170.89 = 12,516.28 : x
2. Step 2: Convert to fraction form
   22,587.87/31,170.89 = 12,516.28/x
3. Step 3: Cross multiply
   22,587.87x = 31,170.89 × 12,516.28
4. Step 4: Simplify right side
   22,587.87x = 390,143,540.45
5. Step 5: Solve for x
   x = 390,143,540.45/22,587.87
6. Step 6: Final answer
   x = 17,272.26