Finding the Fourth Proportional to 1,151.34, 1,724.58 and 712.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,151.34 : 1,724.58 = 712.86 : x
2. Step 2: Convert to fraction form
   1,151.34/1,724.58 = 712.86/x
3. Step 3: Cross multiply
   1,151.34x = 1,724.58 × 712.86
4. Step 4: Simplify right side
   1,151.34x = 1,229,384.10
5. Step 5: Solve for x
   x = 1,229,384.10/1,151.34
6. Step 6: Final answer
   x = 1,067.79