Finding the Fourth Proportional to 1,022.27, 1,525.73 and 997.65

Step by Step Solution

1. Step 1: Write the proportion equation
   1,022.27 : 1,525.73 = 997.65 : x
2. Step 2: Convert to fraction form
   1,022.27/1,525.73 = 997.65/x
3. Step 3: Cross multiply
   1,022.27x = 1,525.73 × 997.65
4. Step 4: Simplify right side
   1,022.27x = 1,522,139.55
5. Step 5: Solve for x
   x = 1,522,139.55/1,022.27
6. Step 6: Final answer
   x = 1,488.99