Finding the Fourth Proportional to 2,618.83, 3,928.92 and 770.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,618.83 : 3,928.92 = 770.01 : x
2. Step 2: Convert to fraction form
   2,618.83/3,928.92 = 770.01/x
3. Step 3: Cross multiply
   2,618.83x = 3,928.92 × 770.01
4. Step 4: Simplify right side
   2,618.83x = 3,025,307.69
5. Step 5: Solve for x
   x = 3,025,307.69/2,618.83
6. Step 6: Final answer
   x = 1,155.21