Finding the Fourth Proportional to 21,380.68, 32,049.15 and 10,831.15

Step by Step Solution

1. Step 1: Write the proportion equation
   21,380.68 : 32,049.15 = 10,831.15 : x
2. Step 2: Convert to fraction form
   21,380.68/32,049.15 = 10,831.15/x
3. Step 3: Cross multiply
   21,380.68x = 32,049.15 × 10,831.15
4. Step 4: Simplify right side
   21,380.68x = 347,129,151.02
5. Step 5: Solve for x
   x = 347,129,151.02/21,380.68
6. Step 6: Final answer
   x = 16,235.65