Finding the Fourth Proportional to 2,209.20, 3,312.18 and 1,168.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,209.20 : 3,312.18 = 1,168.35 : x
2. Step 2: Convert to fraction form
   2,209.20/3,312.18 = 1,168.35/x
3. Step 3: Cross multiply
   2,209.20x = 3,312.18 × 1,168.35
4. Step 4: Simplify right side
   2,209.20x = 3,869,785.50
5. Step 5: Solve for x
   x = 3,869,785.50/2,209.20
6. Step 6: Final answer
   x = 1,751.67