Finding the Fourth Proportional to 1,076.29, 1,485.30 and 610.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076.29 : 1,485.30 = 610.54 : x
2. Step 2: Convert to fraction form
   1,076.29/1,485.30 = 610.54/x
3. Step 3: Cross multiply
   1,076.29x = 1,485.30 × 610.54
4. Step 4: Simplify right side
   1,076.29x = 906,835.06
5. Step 5: Solve for x
   x = 906,835.06/1,076.29
6. Step 6: Final answer
   x = 842.56