Finding the Fourth Proportional to 8,667.54, 12,993.12 and 2,820.06

Step by Step Solution

1. Step 1: Write the proportion equation
   8,667.54 : 12,993.12 = 2,820.06 : x
2. Step 2: Convert to fraction form
   8,667.54/12,993.12 = 2,820.06/x
3. Step 3: Cross multiply
   8,667.54x = 12,993.12 × 2,820.06
4. Step 4: Simplify right side
   8,667.54x = 36,641,377.99
5. Step 5: Solve for x
   x = 36,641,377.99/8,667.54
6. Step 6: Final answer
   x = 4,227.43