Finding the Fourth Proportional to 8,667.75, 12,999.45 and 2,426.15

Step by Step Solution

1. Step 1: Write the proportion equation
   8,667.75 : 12,999.45 = 2,426.15 : x
2. Step 2: Convert to fraction form
   8,667.75/12,999.45 = 2,426.15/x
3. Step 3: Cross multiply
   8,667.75x = 12,999.45 × 2,426.15
4. Step 4: Simplify right side
   8,667.75x = 31,538,550.62
5. Step 5: Solve for x
   x = 31,538,550.62/8,667.75
6. Step 6: Final answer
   x = 3,638.61