Finding the Fourth Proportional to 2,213.72, 3,321.06 and 732.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,213.72 : 3,321.06 = 732.88 : x
2. Step 2: Convert to fraction form
   2,213.72/3,321.06 = 732.88/x
3. Step 3: Cross multiply
   2,213.72x = 3,321.06 × 732.88
4. Step 4: Simplify right side
   2,213.72x = 2,433,938.45
5. Step 5: Solve for x
   x = 2,433,938.45/2,213.72
6. Step 6: Final answer
   x = 1,099.48