Finding the Fourth Proportional to 21,404.32, 32,107.80 and 8,256.76

Step by Step Solution

1. Step 1: Write the proportion equation
   21,404.32 : 32,107.80 = 8,256.76 : x
2. Step 2: Convert to fraction form
   21,404.32/32,107.80 = 8,256.76/x
3. Step 3: Cross multiply
   21,404.32x = 32,107.80 × 8,256.76
4. Step 4: Simplify right side
   21,404.32x = 265,106,398.73
5. Step 5: Solve for x
   x = 265,106,398.73/21,404.32
6. Step 6: Final answer
   x = 12,385.65