Finding the Fourth Proportional to 14,508.78, 21,759.18 and 5,147.52

Step by Step Solution

1. Step 1: Write the proportion equation
   14,508.78 : 21,759.18 = 5,147.52 : x
2. Step 2: Convert to fraction form
   14,508.78/21,759.18 = 5,147.52/x
3. Step 3: Cross multiply
   14,508.78x = 21,759.18 × 5,147.52
4. Step 4: Simplify right side
   14,508.78x = 112,005,814.23
5. Step 5: Solve for x
   x = 112,005,814.23/14,508.78
6. Step 6: Final answer
   x = 7,719.86