Finding the Fourth Proportional to 2,280.48, 3,147.12 and 1,396.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,280.48 : 3,147.12 = 1,396.78 : x
2. Step 2: Convert to fraction form
   2,280.48/3,147.12 = 1,396.78/x
3. Step 3: Cross multiply
   2,280.48x = 3,147.12 × 1,396.78
4. Step 4: Simplify right side
   2,280.48x = 4,395,834.27
5. Step 5: Solve for x
   x = 4,395,834.27/2,280.48
6. Step 6: Final answer
   x = 1,927.59