Finding the Fourth Proportional to 8,426.30, 11,628.72 and 4,889.57

Step by Step Solution

1. Step 1: Write the proportion equation
   8,426.30 : 11,628.72 = 4,889.57 : x
2. Step 2: Convert to fraction form
   8,426.30/11,628.72 = 4,889.57/x
3. Step 3: Cross multiply
   8,426.30x = 11,628.72 × 4,889.57
4. Step 4: Simplify right side
   8,426.30x = 56,859,382.31
5. Step 5: Solve for x
   x = 56,859,382.31/8,426.30
6. Step 6: Final answer
   x = 6,747.85