Finding the Fourth Proportional to 2,515.92, 3,471.89 and 1,396.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,515.92 : 3,471.89 = 1,396.91 : x
2. Step 2: Convert to fraction form
   2,515.92/3,471.89 = 1,396.91/x
3. Step 3: Cross multiply
   2,515.92x = 3,471.89 × 1,396.91
4. Step 4: Simplify right side
   2,515.92x = 4,849,893.52
5. Step 5: Solve for x
   x = 4,849,893.52/2,515.92
6. Step 6: Final answer
   x = 1,927.68