Finding the Fourth Proportional to 2,155.42, 3,235.90 and 1,117.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.42 : 3,235.90 = 1,117.54 : x
2. Step 2: Convert to fraction form
   2,155.42/3,235.90 = 1,117.54/x
3. Step 3: Cross multiply
   2,155.42x = 3,235.90 × 1,117.54
4. Step 4: Simplify right side
   2,155.42x = 3,616,247.69
5. Step 5: Solve for x
   x = 3,616,247.69/2,155.42
6. Step 6: Final answer
   x = 1,677.75