Finding the Fourth Proportional to 2,076.87, 2,865.06 and 1,928.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,076.87 : 2,865.06 = 1,928.64 : x
2. Step 2: Convert to fraction form
   2,076.87/2,865.06 = 1,928.64/x
3. Step 3: Cross multiply
   2,076.87x = 2,865.06 × 1,928.64
4. Step 4: Simplify right side
   2,076.87x = 5,525,669.32
5. Step 5: Solve for x
   x = 5,525,669.32/2,076.87
6. Step 6: Final answer
   x = 2,660.58