Finding the Fourth Proportional to 1,052.88, 1,452.72 and 610.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,052.88 : 1,452.72 = 610.80 : x
2. Step 2: Convert to fraction form
   1,052.88/1,452.72 = 610.80/x
3. Step 3: Cross multiply
   1,052.88x = 1,452.72 × 610.80
4. Step 4: Simplify right side
   1,052.88x = 887,321.38
5. Step 5: Solve for x
   x = 887,321.38/1,052.88
6. Step 6: Final answer
   x = 842.76