Finding the Fourth Proportional to 2,775.82, 3,828.72 and 1,979.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,775.82 : 3,828.72 = 1,979.05 : x
2. Step 2: Convert to fraction form
   2,775.82/3,828.72 = 1,979.05/x
3. Step 3: Cross multiply
   2,775.82x = 3,828.72 × 1,979.05
4. Step 4: Simplify right side
   2,775.82x = 7,577,228.32
5. Step 5: Solve for x
   x = 7,577,228.32/2,775.82
6. Step 6: Final answer
   x = 2,729.73