Finding the Fourth Proportional to 13,026.39, 17,976.30 and 7,057.71

Step by Step Solution

1. Step 1: Write the proportion equation
   13,026.39 : 17,976.30 = 7,057.71 : x
2. Step 2: Convert to fraction form
   13,026.39/17,976.30 = 7,057.71/x
3. Step 3: Cross multiply
   13,026.39x = 17,976.30 × 7,057.71
4. Step 4: Simplify right side
   13,026.39x = 126,871,512.27
5. Step 5: Solve for x
   x = 126,871,512.27/13,026.39
6. Step 6: Final answer
   x = 9,739.58