Finding the Fourth Proportional to 10,647.81, 14,680.33 and 8,726.56

Step by Step Solution

1. Step 1: Write the proportion equation
   10,647.81 : 14,680.33 = 8,726.56 : x
2. Step 2: Convert to fraction form
   10,647.81/14,680.33 = 8,726.56/x
3. Step 3: Cross multiply
   10,647.81x = 14,680.33 × 8,726.56
4. Step 4: Simplify right side
   10,647.81x = 128,108,725.95
5. Step 5: Solve for x
   x = 128,108,725.95/10,647.81
6. Step 6: Final answer
   x = 12,031.46