Finding the Fourth Proportional to 1,046.72, 1,444.20 and 648.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,046.72 : 1,444.20 = 648.32 : x
2. Step 2: Convert to fraction form
   1,046.72/1,444.20 = 648.32/x
3. Step 3: Cross multiply
   1,046.72x = 1,444.20 × 648.32
4. Step 4: Simplify right side
   1,046.72x = 936,303.74
5. Step 5: Solve for x
   x = 936,303.74/1,046.72
6. Step 6: Final answer
   x = 894.51