Finding the Fourth Proportional to 21,766.57, 32,649.72 and 10,508.78

Step by Step Solution

1. Step 1: Write the proportion equation
   21,766.57 : 32,649.72 = 10,508.78 : x
2. Step 2: Convert to fraction form
   21,766.57/32,649.72 = 10,508.78/x
3. Step 3: Cross multiply
   21,766.57x = 32,649.72 × 10,508.78
4. Step 4: Simplify right side
   21,766.57x = 343,108,561.29
5. Step 5: Solve for x
   x = 343,108,561.29/21,766.57
6. Step 6: Final answer
   x = 15,763.10