Finding the Fourth Proportional to 12,724.29, 17,558.65 and 7,058.81

Step by Step Solution

1. Step 1: Write the proportion equation
   12,724.29 : 17,558.65 = 7,058.81 : x
2. Step 2: Convert to fraction form
   12,724.29/17,558.65 = 7,058.81/x
3. Step 3: Cross multiply
   12,724.29x = 17,558.65 × 7,058.81
4. Step 4: Simplify right side
   12,724.29x = 123,943,174.21
5. Step 5: Solve for x
   x = 123,943,174.21/12,724.29
6. Step 6: Final answer
   x = 9,740.68