Finding the Fourth Proportional to 8,510.80, 12,765.84 and 2,667.28

Step by Step Solution

1. Step 1: Write the proportion equation
   8,510.80 : 12,765.84 = 2,667.28 : x
2. Step 2: Convert to fraction form
   8,510.80/12,765.84 = 2,667.28/x
3. Step 3: Cross multiply
   8,510.80x = 12,765.84 × 2,667.28
4. Step 4: Simplify right side
   8,510.80x = 34,050,069.72
5. Step 5: Solve for x
   x = 34,050,069.72/8,510.80
6. Step 6: Final answer
   x = 4,000.81