Finding the Fourth Proportional to 8,626.89, 12,939.87 and 2,783.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,626.89 : 12,939.87 = 2,783.50 : x
2. Step 2: Convert to fraction form
   8,626.89/12,939.87 = 2,783.50/x
3. Step 3: Cross multiply
   8,626.89x = 12,939.87 × 2,783.50
4. Step 4: Simplify right side
   8,626.89x = 36,018,063.45
5. Step 5: Solve for x
   x = 36,018,063.45/8,626.89
6. Step 6: Final answer
   x = 4,175.09