Finding the Fourth Proportional to 2,718.45, 4,077.83 and 770.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,718.45 : 4,077.83 = 770.50 : x
2. Step 2: Convert to fraction form
   2,718.45/4,077.83 = 770.50/x
3. Step 3: Cross multiply
   2,718.45x = 4,077.83 × 770.50
4. Step 4: Simplify right side
   2,718.45x = 3,141,968.02
5. Step 5: Solve for x
   x = 3,141,968.02/2,718.45
6. Step 6: Final answer
   x = 1,155.79