Finding the Fourth Proportional to 1,018.50, 1,526.82 and 531.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.50 : 1,526.82 = 531.88 : x
2. Step 2: Convert to fraction form
   1,018.50/1,526.82 = 531.88/x
3. Step 3: Cross multiply
   1,018.50x = 1,526.82 × 531.88
4. Step 4: Simplify right side
   1,018.50x = 812,085.02
5. Step 5: Solve for x
   x = 812,085.02/1,018.50
6. Step 6: Final answer
   x = 797.33