Finding the Fourth Proportional to 1,076.19, 1,485.32 and 610.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076.19 : 1,485.32 = 610.71 : x
2. Step 2: Convert to fraction form
   1,076.19/1,485.32 = 610.71/x
3. Step 3: Cross multiply
   1,076.19x = 1,485.32 × 610.71
4. Step 4: Simplify right side
   1,076.19x = 907,099.78
5. Step 5: Solve for x
   x = 907,099.78/1,076.19
6. Step 6: Final answer
   x = 842.88