Finding the Fourth Proportional to 1,067.42, 1,472.82 and 647.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,067.42 : 1,472.82 = 647.76 : x
2. Step 2: Convert to fraction form
   1,067.42/1,472.82 = 647.76/x
3. Step 3: Cross multiply
   1,067.42x = 1,472.82 × 647.76
4. Step 4: Simplify right side
   1,067.42x = 954,033.88
5. Step 5: Solve for x
   x = 954,033.88/1,067.42
6. Step 6: Final answer
   x = 893.78