Finding the Fourth Proportional to 22,402.80, 30,915.72 and 12,330.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,402.80 : 30,915.72 = 12,330.72 : x
2. Step 2: Convert to fraction form
   22,402.80/30,915.72 = 12,330.72/x
3. Step 3: Cross multiply
   22,402.80x = 30,915.72 × 12,330.72
4. Step 4: Simplify right side
   22,402.80x = 381,213,086.92
5. Step 5: Solve for x
   x = 381,213,086.92/22,402.80
6. Step 6: Final answer
   x = 17,016.31