Finding the Fourth Proportional to 22,403.72, 30,912.17 and 12,966.82

Step by Step Solution

1. Step 1: Write the proportion equation
   22,403.72 : 30,912.17 = 12,966.82 : x
2. Step 2: Convert to fraction form
   22,403.72/30,912.17 = 12,966.82/x
3. Step 3: Cross multiply
   22,403.72x = 30,912.17 × 12,966.82
4. Step 4: Simplify right side
   22,403.72x = 400,832,544.20
5. Step 5: Solve for x
   x = 400,832,544.20/22,403.72
6. Step 6: Final answer
   x = 17,891.34