Finding the Fourth Proportional to 2,103.22, 2,902.65 and 1,171.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,103.22 : 2,902.65 = 1,171.78 : x
2. Step 2: Convert to fraction form
   2,103.22/2,902.65 = 1,171.78/x
3. Step 3: Cross multiply
   2,103.22x = 2,902.65 × 1,171.78
4. Step 4: Simplify right side
   2,103.22x = 3,401,267.22
5. Step 5: Solve for x
   x = 3,401,267.22/2,103.22
6. Step 6: Final answer
   x = 1,617.17