Finding the Fourth Proportional to 2,213.30, 3,320.22 and 752.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,213.30 : 3,320.22 = 752.60 : x
2. Step 2: Convert to fraction form
   2,213.30/3,320.22 = 752.60/x
3. Step 3: Cross multiply
   2,213.30x = 3,320.22 × 752.60
4. Step 4: Simplify right side
   2,213.30x = 2,498,797.57
5. Step 5: Solve for x
   x = 2,498,797.57/2,213.30
6. Step 6: Final answer
   x = 1,128.99