Finding the Fourth Proportional to 1,019.88, 1,525.50 and 691.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.88 : 1,525.50 = 691.56 : x
2. Step 2: Convert to fraction form
   1,019.88/1,525.50 = 691.56/x
3. Step 3: Cross multiply
   1,019.88x = 1,525.50 × 691.56
4. Step 4: Simplify right side
   1,019.88x = 1,054,974.78
5. Step 5: Solve for x
   x = 1,054,974.78/1,019.88
6. Step 6: Final answer
   x = 1,034.41