Finding the Fourth Proportional to 1,076.06, 1,483.35 and 842.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076.06 : 1,483.35 = 842.78 : x
2. Step 2: Convert to fraction form
   1,076.06/1,483.35 = 842.78/x
3. Step 3: Cross multiply
   1,076.06x = 1,483.35 × 842.78
4. Step 4: Simplify right side
   1,076.06x = 1,250,137.71
5. Step 5: Solve for x
   x = 1,250,137.71/1,076.06
6. Step 6: Final answer
   x = 1,161.77