Finding the Fourth Proportional to 21,403.52, 32,106.72 and 8,256

Step by Step Solution

1. Step 1: Write the proportion equation
   21,403.52 : 32,106.72 = 8,256 : x
2. Step 2: Convert to fraction form
   21,403.52/32,106.72 = 8,256/x
3. Step 3: Cross multiply
   21,403.52x = 32,106.72 × 8,256
4. Step 4: Simplify right side
   21,403.52x = 265,073,080.32
5. Step 5: Solve for x
   x = 265,073,080.32/21,403.52
6. Step 6: Final answer
   x = 12,384.56