Finding the Fourth Proportional to 2,800.72, 3,866.28 and 2,054.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,800.72 : 3,866.28 = 2,054.72 : x
2. Step 2: Convert to fraction form
   2,800.72/3,866.28 = 2,054.72/x
3. Step 3: Cross multiply
   2,800.72x = 3,866.28 × 2,054.72
4. Step 4: Simplify right side
   2,800.72x = 7,944,122.84
5. Step 5: Solve for x
   x = 7,944,122.84/2,800.72
6. Step 6: Final answer
   x = 2,836.46