Finding the Fourth Proportional to 8,667.83, 12,997.62 and 4,280.16

Step by Step Solution

1. Step 1: Write the proportion equation
   8,667.83 : 12,997.62 = 4,280.16 : x
2. Step 2: Convert to fraction form
   8,667.83/12,997.62 = 4,280.16/x
3. Step 3: Cross multiply
   8,667.83x = 12,997.62 × 4,280.16
4. Step 4: Simplify right side
   8,667.83x = 55,631,893.22
5. Step 5: Solve for x
   x = 55,631,893.22/8,667.83
6. Step 6: Final answer
   x = 6,418.20