Finding the Fourth Proportional to 12,228.31, 18,339.52 and 5,648.17

Step by Step Solution

1. Step 1: Write the proportion equation
   12,228.31 : 18,339.52 = 5,648.17 : x
2. Step 2: Convert to fraction form
   12,228.31/18,339.52 = 5,648.17/x
3. Step 3: Cross multiply
   12,228.31x = 18,339.52 × 5,648.17
4. Step 4: Simplify right side
   12,228.31x = 103,584,726.68
5. Step 5: Solve for x
   x = 103,584,726.68/12,228.31
6. Step 6: Final answer
   x = 8,470.89