Finding the Fourth Proportional to 8,628.59, 12,938.83 and 3,947.27

Step by Step Solution

1. Step 1: Write the proportion equation
   8,628.59 : 12,938.83 = 3,947.27 : x
2. Step 2: Convert to fraction form
   8,628.59/12,938.83 = 3,947.27/x
3. Step 3: Cross multiply
   8,628.59x = 12,938.83 × 3,947.27
4. Step 4: Simplify right side
   8,628.59x = 51,072,980.93
5. Step 5: Solve for x
   x = 51,072,980.93/8,628.59
6. Step 6: Final answer
   x = 5,919.04