Finding the Fourth Proportional to 2,718.56, 4,078.00 and 770.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,718.56 : 4,078.00 = 770.92 : x
2. Step 2: Convert to fraction form
   2,718.56/4,078.00 = 770.92/x
3. Step 3: Cross multiply
   2,718.56x = 4,078.00 × 770.92
4. Step 4: Simplify right side
   2,718.56x = 3,143,798.19
5. Step 5: Solve for x
   x = 3,143,798.19/2,718.56
6. Step 6: Final answer
   x = 1,156.42