Finding the Fourth Proportional to 1,010.55, 1,519.43 and 852.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,010.55 : 1,519.43 = 852.15 : x
2. Step 2: Convert to fraction form
   1,010.55/1,519.43 = 852.15/x
3. Step 3: Cross multiply
   1,010.55x = 1,519.43 × 852.15
4. Step 4: Simplify right side
   1,010.55x = 1,294,778.01
5. Step 5: Solve for x
   x = 1,294,778.01/1,010.55
6. Step 6: Final answer
   x = 1,281.26