Finding the Fourth Proportional to 711.32, 1,067.78 and 670.82

Step by Step Solution

1. Step 1: Write the proportion equation
   711.32 : 1,067.78 = 670.82 : x
2. Step 2: Convert to fraction form
   711.32/1,067.78 = 670.82/x
3. Step 3: Cross multiply
   711.32x = 1,067.78 × 670.82
4. Step 4: Simplify right side
   711.32x = 716,284.52
5. Step 5: Solve for x
   x = 716,284.52/711.32
6. Step 6: Final answer
   x = 1,006.99