Finding the Fourth Proportional to 22,915.74, 31,624.98 and 12,847.42

Step by Step Solution

1. Step 1: Write the proportion equation
   22,915.74 : 31,624.98 = 12,847.42 : x
2. Step 2: Convert to fraction form
   22,915.74/31,624.98 = 12,847.42/x
3. Step 3: Cross multiply
   22,915.74x = 31,624.98 × 12,847.42
4. Step 4: Simplify right side
   22,915.74x = 406,299,400.55
5. Step 5: Solve for x
   x = 406,299,400.55/22,915.74
6. Step 6: Final answer
   x = 17,730.15