Finding the Fourth Proportional to 22,547.28, 31,116.12 and 12,339

Step by Step Solution

1. Step 1: Write the proportion equation
   22,547.28 : 31,116.12 = 12,339 : x
2. Step 2: Convert to fraction form
   22,547.28/31,116.12 = 12,339/x
3. Step 3: Cross multiply
   22,547.28x = 31,116.12 × 12,339
4. Step 4: Simplify right side
   22,547.28x = 383,941,804.68
5. Step 5: Solve for x
   x = 383,941,804.68/22,547.28
6. Step 6: Final answer
   x = 17,028.30