Finding the Fourth Proportional to 17,915.16, 24,725.62 and 12,896

Step by Step Solution

1. Step 1: Write the proportion equation
   17,915.16 : 24,725.62 = 12,896 : x
2. Step 2: Convert to fraction form
   17,915.16/24,725.62 = 12,896/x
3. Step 3: Cross multiply
   17,915.16x = 24,725.62 × 12,896
4. Step 4: Simplify right side
   17,915.16x = 318,861,595.52
5. Step 5: Solve for x
   x = 318,861,595.52/17,915.16
6. Step 6: Final answer
   x = 17,798.42