Finding the Fourth Proportional to 1,060.55, 1,589.12 and 712.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,060.55 : 1,589.12 = 712.60 : x
2. Step 2: Convert to fraction form
   1,060.55/1,589.12 = 712.60/x
3. Step 3: Cross multiply
   1,060.55x = 1,589.12 × 712.60
4. Step 4: Simplify right side
   1,060.55x = 1,132,399.38
5. Step 5: Solve for x
   x = 1,132,399.38/1,060.55
6. Step 6: Final answer
   x = 1,067.75