Finding the Fourth Proportional to 2,800.86, 3,864.15 and 2,796.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,800.86 : 3,864.15 = 2,796.54 : x
2. Step 2: Convert to fraction form
   2,800.86/3,864.15 = 2,796.54/x
3. Step 3: Cross multiply
   2,800.86x = 3,864.15 × 2,796.54
4. Step 4: Simplify right side
   2,800.86x = 10,806,250.04
5. Step 5: Solve for x
   x = 10,806,250.04/2,800.86
6. Step 6: Final answer
   x = 3,858.19