Finding the Fourth Proportional to 2,076.10, 3,115.52 and 777.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,076.10 : 3,115.52 = 777.56 : x
2. Step 2: Convert to fraction form
   2,076.10/3,115.52 = 777.56/x
3. Step 3: Cross multiply
   2,076.10x = 3,115.52 × 777.56
4. Step 4: Simplify right side
   2,076.10x = 2,422,503.73
5. Step 5: Solve for x
   x = 2,422,503.73/2,076.10
6. Step 6: Final answer
   x = 1,166.85