Finding the Fourth Proportional to 2,616.96, 3,611.42 and 1,438.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,616.96 : 3,611.42 = 1,438.04 : x
2. Step 2: Convert to fraction form
   2,616.96/3,611.42 = 1,438.04/x
3. Step 3: Cross multiply
   2,616.96x = 3,611.42 × 1,438.04
4. Step 4: Simplify right side
   2,616.96x = 5,193,366.42
5. Step 5: Solve for x
   x = 5,193,366.42/2,616.96
6. Step 6: Final answer
   x = 1,984.50