Finding the Fourth Proportional to 2,108.76, 3,158.34 and 1,241.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,108.76 : 3,158.34 = 1,241.40 : x
2. Step 2: Convert to fraction form
   2,108.76/3,158.34 = 1,241.40/x
3. Step 3: Cross multiply
   2,108.76x = 3,158.34 × 1,241.40
4. Step 4: Simplify right side
   2,108.76x = 3,920,763.28
5. Step 5: Solve for x
   x = 3,920,763.28/2,108.76
6. Step 6: Final answer
   x = 1,859.27