Finding the Fourth Proportional to 5,426.27, 8,136.72 and 1,915.38

Step by Step Solution

1. Step 1: Write the proportion equation
   5,426.27 : 8,136.72 = 1,915.38 : x
2. Step 2: Convert to fraction form
   5,426.27/8,136.72 = 1,915.38/x
3. Step 3: Cross multiply
   5,426.27x = 8,136.72 × 1,915.38
4. Step 4: Simplify right side
   5,426.27x = 15,584,910.75
5. Step 5: Solve for x
   x = 15,584,910.75/5,426.27
6. Step 6: Final answer
   x = 2,872.12