Finding the Fourth Proportional to 1,075.32, 1,613.96 and 665.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,075.32 : 1,613.96 = 665.25 : x
2. Step 2: Convert to fraction form
   1,075.32/1,613.96 = 665.25/x
3. Step 3: Cross multiply
   1,075.32x = 1,613.96 × 665.25
4. Step 4: Simplify right side
   1,075.32x = 1,073,686.89
5. Step 5: Solve for x
   x = 1,073,686.89/1,075.32
6. Step 6: Final answer
   x = 998.48