Finding the Fourth Proportional to 2,617, 3,611.55 and 1,438.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,617 : 3,611.55 = 1,438.15 : x
2. Step 2: Convert to fraction form
   2,617/3,611.55 = 1,438.15/x
3. Step 3: Cross multiply
   2,617x = 3,611.55 × 1,438.15
4. Step 4: Simplify right side
   2,617x = 5,193,950.63
5. Step 5: Solve for x
   x = 5,193,950.63/2,617
6. Step 6: Final answer
   x = 1,984.70