Finding the Fourth Proportional to 1,076.61, 1,485.54 and 656.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076.61 : 1,485.54 = 656.82 : x
2. Step 2: Convert to fraction form
   1,076.61/1,485.54 = 656.82/x
3. Step 3: Cross multiply
   1,076.61x = 1,485.54 × 656.82
4. Step 4: Simplify right side
   1,076.61x = 975,732.38
5. Step 5: Solve for x
   x = 975,732.38/1,076.61
6. Step 6: Final answer
   x = 906.30