Finding the Fourth Proportional to 1,067.36, 1,472.52 and 647.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,067.36 : 1,472.52 = 647.72 : x
2. Step 2: Convert to fraction form
   1,067.36/1,472.52 = 647.72/x
3. Step 3: Cross multiply
   1,067.36x = 1,472.52 × 647.72
4. Step 4: Simplify right side
   1,067.36x = 953,780.65
5. Step 5: Solve for x
   x = 953,780.65/1,067.36
6. Step 6: Final answer
   x = 893.59