Finding the Fourth Proportional to 1,396.17, 2,103.71 and 1,158.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,396.17 : 2,103.71 = 1,158.03 : x
2. Step 2: Convert to fraction form
   1,396.17/2,103.71 = 1,158.03/x
3. Step 3: Cross multiply
   1,396.17x = 2,103.71 × 1,158.03
4. Step 4: Simplify right side
   1,396.17x = 2,436,153.50
5. Step 5: Solve for x
   x = 2,436,153.50/1,396.17
6. Step 6: Final answer
   x = 1,744.88