Finding the Fourth Proportional to 1,082.72, 1,624.80 and 698.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,082.72 : 1,624.80 = 698.24 : x
2. Step 2: Convert to fraction form
   1,082.72/1,624.80 = 698.24/x
3. Step 3: Cross multiply
   1,082.72x = 1,624.80 × 698.24
4. Step 4: Simplify right side
   1,082.72x = 1,134,500.35
5. Step 5: Solve for x
   x = 1,134,500.35/1,082.72
6. Step 6: Final answer
   x = 1,047.82