Finding the Fourth Proportional to 1,019.59, 1,526.65 and 531.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.59 : 1,526.65 = 531.61 : x
2. Step 2: Convert to fraction form
   1,019.59/1,526.65 = 531.61/x
3. Step 3: Cross multiply
   1,019.59x = 1,526.65 × 531.61
4. Step 4: Simplify right side
   1,019.59x = 811,585.85
5. Step 5: Solve for x
   x = 811,585.85/1,019.59
6. Step 6: Final answer
   x = 795.99