Finding the Fourth Proportional to 1,082.56, 1,624.20 and 352.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,082.56 : 1,624.20 = 352.16 : x
2. Step 2: Convert to fraction form
   1,082.56/1,624.20 = 352.16/x
3. Step 3: Cross multiply
   1,082.56x = 1,624.20 × 352.16
4. Step 4: Simplify right side
   1,082.56x = 571,978.27
5. Step 5: Solve for x
   x = 571,978.27/1,082.56
6. Step 6: Final answer
   x = 528.36