Finding the Fourth Proportional to 12,443.56, 17,170.74 and 7,066.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,443.56 : 17,170.74 = 7,066.20 : x
2. Step 2: Convert to fraction form
   12,443.56/17,170.74 = 7,066.20/x
3. Step 3: Cross multiply
   12,443.56x = 17,170.74 × 7,066.20
4. Step 4: Simplify right side
   12,443.56x = 121,331,882.99
5. Step 5: Solve for x
   x = 121,331,882.99/12,443.56
6. Step 6: Final answer
   x = 9,750.58