Finding the Fourth Proportional to 12,234.43, 18,354.38 and 3,915.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,234.43 : 18,354.38 = 3,915.12 : x
2. Step 2: Convert to fraction form
   12,234.43/18,354.38 = 3,915.12/x
3. Step 3: Cross multiply
   12,234.43x = 18,354.38 × 3,915.12
4. Step 4: Simplify right side
   12,234.43x = 71,859,600.23
5. Step 5: Solve for x
   x = 71,859,600.23/12,234.43
6. Step 6: Final answer
   x = 5,873.56