Finding the Fourth Proportional to 13,011.71, 17,938.30 and 8,229.27

Step by Step Solution

1. Step 1: Write the proportion equation
   13,011.71 : 17,938.30 = 8,229.27 : x
2. Step 2: Convert to fraction form
   13,011.71/17,938.30 = 8,229.27/x
3. Step 3: Cross multiply
   13,011.71x = 17,938.30 × 8,229.27
4. Step 4: Simplify right side
   13,011.71x = 147,619,093.47
5. Step 5: Solve for x
   x = 147,619,093.47/13,011.71
6. Step 6: Final answer
   x = 11,345.09