Finding the Fourth Proportional to 2,103.62, 3,155.22 and 918.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,103.62 : 3,155.22 = 918.18 : x
2. Step 2: Convert to fraction form
   2,103.62/3,155.22 = 918.18/x
3. Step 3: Cross multiply
   2,103.62x = 3,155.22 × 918.18
4. Step 4: Simplify right side
   2,103.62x = 2,897,059.90
5. Step 5: Solve for x
   x = 2,897,059.90/2,103.62
6. Step 6: Final answer
   x = 1,377.18