Finding the Fourth Proportional to 2,617.05, 3,611.46 and 1,438.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,617.05 : 3,611.46 = 1,438.05 : x
2. Step 2: Convert to fraction form
   2,617.05/3,611.46 = 1,438.05/x
3. Step 3: Cross multiply
   2,617.05x = 3,611.46 × 1,438.05
4. Step 4: Simplify right side
   2,617.05x = 5,193,460.05
5. Step 5: Solve for x
   x = 5,193,460.05/2,617.05
6. Step 6: Final answer
   x = 1,984.47