Finding the Fourth Proportional to 12,738, 17,585.42 and 8,915.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,738 : 17,585.42 = 8,915.52 : x
2. Step 2: Convert to fraction form
   12,738/17,585.42 = 8,915.52/x
3. Step 3: Cross multiply
   12,738x = 17,585.42 × 8,915.52
4. Step 4: Simplify right side
   12,738x = 156,783,119.14
5. Step 5: Solve for x
   x = 156,783,119.14/12,738
6. Step 6: Final answer
   x = 12,308.30