Finding the Fourth Proportional to 2,103.12, 2,902.20 and 1,171.44

Step by Step Solution

1. Step 1: Write the proportion equation
   2,103.12 : 2,902.20 = 1,171.44 : x
2. Step 2: Convert to fraction form
   2,103.12/2,902.20 = 1,171.44/x
3. Step 3: Cross multiply
   2,103.12x = 2,902.20 × 1,171.44
4. Step 4: Simplify right side
   2,103.12x = 3,399,753.17
5. Step 5: Solve for x
   x = 3,399,753.17/2,103.12
6. Step 6: Final answer
   x = 1,616.53