Finding the Fourth Proportional to 12,724.28, 17,559.48 and 7,059.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,724.28 : 17,559.48 = 7,059.89 : x
2. Step 2: Convert to fraction form
   12,724.28/17,559.48 = 7,059.89/x
3. Step 3: Cross multiply
   12,724.28x = 17,559.48 × 7,059.89
4. Step 4: Simplify right side
   12,724.28x = 123,968,041.16
5. Step 5: Solve for x
   x = 123,968,041.16/12,724.28
6. Step 6: Final answer
   x = 9,742.64