Finding the Fourth Proportional to 22,515.16, 31,068.94 and 12,443.60

Step by Step Solution

1. Step 1: Write the proportion equation
   22,515.16 : 31,068.94 = 12,443.60 : x
2. Step 2: Convert to fraction form
   22,515.16/31,068.94 = 12,443.60/x
3. Step 3: Cross multiply
   22,515.16x = 31,068.94 × 12,443.60
4. Step 4: Simplify right side
   22,515.16x = 386,609,461.78
5. Step 5: Solve for x
   x = 386,609,461.78/22,515.16
6. Step 6: Final answer
   x = 17,171.07