Finding the Fourth Proportional to 2,617.30, 3,611.72 and 1,438.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,617.30 : 3,611.72 = 1,438.16 : x
2. Step 2: Convert to fraction form
   2,617.30/3,611.72 = 1,438.16/x
3. Step 3: Cross multiply
   2,617.30x = 3,611.72 × 1,438.16
4. Step 4: Simplify right side
   2,617.30x = 5,194,231.24
5. Step 5: Solve for x
   x = 5,194,231.24/2,617.30
6. Step 6: Final answer
   x = 1,984.58