Finding the Fourth Proportional to 12,724.79, 17,560.25 and 7,059.65

Step by Step Solution

1. Step 1: Write the proportion equation
   12,724.79 : 17,560.25 = 7,059.65 : x
2. Step 2: Convert to fraction form
   12,724.79/17,560.25 = 7,059.65/x
3. Step 3: Cross multiply
   12,724.79x = 17,560.25 × 7,059.65
4. Step 4: Simplify right side
   12,724.79x = 123,969,095.81
5. Step 5: Solve for x
   x = 123,969,095.81/12,724.79
6. Step 6: Final answer
   x = 9,742.33