Finding the Fourth Proportional to 2,077.59, 3,116.85 and 779.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,077.59 : 3,116.85 = 779.07 : x
2. Step 2: Convert to fraction form
   2,077.59/3,116.85 = 779.07/x
3. Step 3: Cross multiply
   2,077.59x = 3,116.85 × 779.07
4. Step 4: Simplify right side
   2,077.59x = 2,428,244.33
5. Step 5: Solve for x
   x = 2,428,244.33/2,077.59
6. Step 6: Final answer
   x = 1,168.78