Finding the Fourth Proportional to 1,076.24, 1,485.28 and 656.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076.24 : 1,485.28 = 656.47 : x
2. Step 2: Convert to fraction form
   1,076.24/1,485.28 = 656.47/x
3. Step 3: Cross multiply
   1,076.24x = 1,485.28 × 656.47
4. Step 4: Simplify right side
   1,076.24x = 975,046.77
5. Step 5: Solve for x
   x = 975,046.77/1,076.24
6. Step 6: Final answer
   x = 905.98