Finding the Fourth Proportional to 12,443.28, 17,171.10 and 7,727.46

Step by Step Solution

1. Step 1: Write the proportion equation
   12,443.28 : 17,171.10 = 7,727.46 : x
2. Step 2: Convert to fraction form
   12,443.28/17,171.10 = 7,727.46/x
3. Step 3: Cross multiply
   12,443.28x = 17,171.10 × 7,727.46
4. Step 4: Simplify right side
   12,443.28x = 132,688,988.41
5. Step 5: Solve for x
   x = 132,688,988.41/12,443.28
6. Step 6: Final answer
   x = 10,663.51