Finding the Fourth Proportional to 22,515.48, 31,070.12 and 12,443.32

Step by Step Solution

1. Step 1: Write the proportion equation
   22,515.48 : 31,070.12 = 12,443.32 : x
2. Step 2: Convert to fraction form
   22,515.48/31,070.12 = 12,443.32/x
3. Step 3: Cross multiply
   22,515.48x = 31,070.12 × 12,443.32
4. Step 4: Simplify right side
   22,515.48x = 386,615,415.78
5. Step 5: Solve for x
   x = 386,615,415.78/22,515.48
6. Step 6: Final answer
   x = 17,171.09