Finding the Fourth Proportional to 14,978.52, 20,647.58 and 12,321.32

Step by Step Solution

1. Step 1: Write the proportion equation
   14,978.52 : 20,647.58 = 12,321.32 : x
2. Step 2: Convert to fraction form
   14,978.52/20,647.58 = 12,321.32/x
3. Step 3: Cross multiply
   14,978.52x = 20,647.58 × 12,321.32
4. Step 4: Simplify right side
   14,978.52x = 254,405,275.56
5. Step 5: Solve for x
   x = 254,405,275.56/14,978.52
6. Step 6: Final answer
   x = 16,984.67