Finding the Fourth Proportional to 2,077.76, 3,115.41 and 779.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,077.76 : 3,115.41 = 779.33 : x
2. Step 2: Convert to fraction form
   2,077.76/3,115.41 = 779.33/x
3. Step 3: Cross multiply
   2,077.76x = 3,115.41 × 779.33
4. Step 4: Simplify right side
   2,077.76x = 2,427,916.90
5. Step 5: Solve for x
   x = 2,427,916.90/2,077.76
6. Step 6: Final answer
   x = 1,168.53