Finding the Fourth Proportional to 2,616.90, 3,611.32 and 1,438.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,616.90 : 3,611.32 = 1,438.04 : x
2. Step 2: Convert to fraction form
   2,616.90/3,611.32 = 1,438.04/x
3. Step 3: Cross multiply
   2,616.90x = 3,611.32 × 1,438.04
4. Step 4: Simplify right side
   2,616.90x = 5,193,222.61
5. Step 5: Solve for x
   x = 5,193,222.61/2,616.90
6. Step 6: Final answer
   x = 1,984.49