Finding the Fourth Proportional to 12,622.52, 18,939 and 5,228.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,622.52 : 18,939 = 5,228.48 : x
2. Step 2: Convert to fraction form
   12,622.52/18,939 = 5,228.48/x
3. Step 3: Cross multiply
   12,622.52x = 18,939 × 5,228.48
4. Step 4: Simplify right side
   12,622.52x = 99,022,182.72
5. Step 5: Solve for x
   x = 99,022,182.72/12,622.52
6. Step 6: Final answer
   x = 7,844.88