Finding the Fourth Proportional to 2,215.04, 3,321.72 and 753.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.04 : 3,321.72 = 753.80 : x
2. Step 2: Convert to fraction form
   2,215.04/3,321.72 = 753.80/x
3. Step 3: Cross multiply
   2,215.04x = 3,321.72 × 753.80
4. Step 4: Simplify right side
   2,215.04x = 2,503,912.54
5. Step 5: Solve for x
   x = 2,503,912.54/2,215.04
6. Step 6: Final answer
   x = 1,130.41