Finding the Fourth Proportional to 12,723.29, 17,557.27 and 7,057.81

Step by Step Solution

1. Step 1: Write the proportion equation
   12,723.29 : 17,557.27 = 7,057.81 : x
2. Step 2: Convert to fraction form
   12,723.29/17,557.27 = 7,057.81/x
3. Step 3: Cross multiply
   12,723.29x = 17,557.27 × 7,057.81
4. Step 4: Simplify right side
   12,723.29x = 123,915,875.78
5. Step 5: Solve for x
   x = 123,915,875.78/12,723.29
6. Step 6: Final answer
   x = 9,739.30