Finding the Fourth Proportional to 12,698.71, 17,524.20 and 7,109.71

Step by Step Solution

1. Step 1: Write the proportion equation
   12,698.71 : 17,524.20 = 7,109.71 : x
2. Step 2: Convert to fraction form
   12,698.71/17,524.20 = 7,109.71/x
3. Step 3: Cross multiply
   12,698.71x = 17,524.20 × 7,109.71
4. Step 4: Simplify right side
   12,698.71x = 124,591,979.98
5. Step 5: Solve for x
   x = 124,591,979.98/12,698.71
6. Step 6: Final answer
   x = 9,811.39