Finding the Fourth Proportional to 13,353.29, 19,979.04 and 8,288.27

Step by Step Solution

1. Step 1: Write the proportion equation
   13,353.29 : 19,979.04 = 8,288.27 : x
2. Step 2: Convert to fraction form
   13,353.29/19,979.04 = 8,288.27/x
3. Step 3: Cross multiply
   13,353.29x = 19,979.04 × 8,288.27
4. Step 4: Simplify right side
   13,353.29x = 165,591,677.86
5. Step 5: Solve for x
   x = 165,591,677.86/13,353.29
6. Step 6: Final answer
   x = 12,400.81