Finding the Fourth Proportional to 21,417.28, 32,131.36 and 8,266.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,417.28 : 32,131.36 = 8,266.12 : x
2. Step 2: Convert to fraction form
   21,417.28/32,131.36 = 8,266.12/x
3. Step 3: Cross multiply
   21,417.28x = 32,131.36 × 8,266.12
4. Step 4: Simplify right side
   21,417.28x = 265,601,677.52
5. Step 5: Solve for x
   x = 265,601,677.52/21,417.28
6. Step 6: Final answer
   x = 12,401.28