Finding the Fourth Proportional to 2,076.79, 3,112.49 and 842.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,076.79 : 3,112.49 = 842.76 : x
2. Step 2: Convert to fraction form
   2,076.79/3,112.49 = 842.76/x
3. Step 3: Cross multiply
   2,076.79x = 3,112.49 × 842.76
4. Step 4: Simplify right side
   2,076.79x = 2,623,082.07
5. Step 5: Solve for x
   x = 2,623,082.07/2,076.79
6. Step 6: Final answer
   x = 1,263.05