Finding the Fourth Proportional to 1,067.42, 1,472.98 and 647.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,067.42 : 1,472.98 = 647.80 : x
2. Step 2: Convert to fraction form
   1,067.42/1,472.98 = 647.80/x
3. Step 3: Cross multiply
   1,067.42x = 1,472.98 × 647.80
4. Step 4: Simplify right side
   1,067.42x = 954,196.44
5. Step 5: Solve for x
   x = 954,196.44/1,067.42
6. Step 6: Final answer
   x = 893.93