Finding the Fourth Proportional to 2,617.27, 3,611.84 and 1,438.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,617.27 : 3,611.84 = 1,438.40 : x
2. Step 2: Convert to fraction form
   2,617.27/3,611.84 = 1,438.40/x
3. Step 3: Cross multiply
   2,617.27x = 3,611.84 × 1,438.40
4. Step 4: Simplify right side
   2,617.27x = 5,195,263.46
5. Step 5: Solve for x
   x = 5,195,263.46/2,617.27
6. Step 6: Final answer
   x = 1,984.99