Finding the Fourth Proportional to 1,076.77, 1,485.56 and 611.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076.77 : 1,485.56 = 611.02 : x
2. Step 2: Convert to fraction form
   1,076.77/1,485.56 = 611.02/x
3. Step 3: Cross multiply
   1,076.77x = 1,485.56 × 611.02
4. Step 4: Simplify right side
   1,076.77x = 907,696.39
5. Step 5: Solve for x
   x = 907,696.39/1,076.77
6. Step 6: Final answer
   x = 842.98