Finding the Fourth Proportional to 21,411.84, 32,121.80 and 8,265.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,411.84 : 32,121.80 = 8,265.52 : x
2. Step 2: Convert to fraction form
   21,411.84/32,121.80 = 8,265.52/x
3. Step 3: Cross multiply
   21,411.84x = 32,121.80 × 8,265.52
4. Step 4: Simplify right side
   21,411.84x = 265,503,380.34
5. Step 5: Solve for x
   x = 265,503,380.34/21,411.84
6. Step 6: Final answer
   x = 12,399.84