Finding the Fourth Proportional to 2,168.30, 3,255.45 and 1,393.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,168.30 : 3,255.45 = 1,393.10 : x
2. Step 2: Convert to fraction form
   2,168.30/3,255.45 = 1,393.10/x
3. Step 3: Cross multiply
   2,168.30x = 3,255.45 × 1,393.10
4. Step 4: Simplify right side
   2,168.30x = 4,535,167.40
5. Step 5: Solve for x
   x = 4,535,167.40/2,168.30
6. Step 6: Final answer
   x = 2,091.58