Finding the Fourth Proportional to 1,076.67, 1,485.68 and 610.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076.67 : 1,485.68 = 610.83 : x
2. Step 2: Convert to fraction form
   1,076.67/1,485.68 = 610.83/x
3. Step 3: Cross multiply
   1,076.67x = 1,485.68 × 610.83
4. Step 4: Simplify right side
   1,076.67x = 907,494.86
5. Step 5: Solve for x
   x = 907,494.86/1,076.67
6. Step 6: Final answer
   x = 842.87