Finding the Fourth Proportional to 1,055.76, 1,456.28 and 662.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,055.76 : 1,456.28 = 662.72 : x
2. Step 2: Convert to fraction form
   1,055.76/1,456.28 = 662.72/x
3. Step 3: Cross multiply
   1,055.76x = 1,456.28 × 662.72
4. Step 4: Simplify right side
   1,055.76x = 965,105.88
5. Step 5: Solve for x
   x = 965,105.88/1,055.76
6. Step 6: Final answer
   x = 914.13