Finding the Fourth Proportional to 2,311.62, 3,468.31 and 1,387.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,311.62 : 3,468.31 = 1,387.83 : x
2. Step 2: Convert to fraction form
   2,311.62/3,468.31 = 1,387.83/x
3. Step 3: Cross multiply
   2,311.62x = 3,468.31 × 1,387.83
4. Step 4: Simplify right side
   2,311.62x = 4,813,413.40
5. Step 5: Solve for x
   x = 4,813,413.40/2,311.62
6. Step 6: Final answer
   x = 2,082.27