Finding the Fourth Proportional to 2,766.01, 3,811.84 and 1,978.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,766.01 : 3,811.84 = 1,978.69 : x
2. Step 2: Convert to fraction form
   2,766.01/3,811.84 = 1,978.69/x
3. Step 3: Cross multiply
   2,766.01x = 3,811.84 × 1,978.69
4. Step 4: Simplify right side
   2,766.01x = 7,542,449.69
5. Step 5: Solve for x
   x = 7,542,449.69/2,766.01
6. Step 6: Final answer
   x = 2,726.83