Finding the Fourth Proportional to 2,213.37, 3,320.53 and 826.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,213.37 : 3,320.53 = 826.72 : x
2. Step 2: Convert to fraction form
   2,213.37/3,320.53 = 826.72/x
3. Step 3: Cross multiply
   2,213.37x = 3,320.53 × 826.72
4. Step 4: Simplify right side
   2,213.37x = 2,745,138.19
5. Step 5: Solve for x
   x = 2,745,138.19/2,213.37
6. Step 6: Final answer
   x = 1,240.25