Finding the Fourth Proportional to 13,608.69, 20,414.32 and 5,289.35

Step by Step Solution

1. Step 1: Write the proportion equation
   13,608.69 : 20,414.32 = 5,289.35 : x
2. Step 2: Convert to fraction form
   13,608.69/20,414.32 = 5,289.35/x
3. Step 3: Cross multiply
   13,608.69x = 20,414.32 × 5,289.35
4. Step 4: Simplify right side
   13,608.69x = 107,978,381.42
5. Step 5: Solve for x
   x = 107,978,381.42/13,608.69
6. Step 6: Final answer
   x = 7,934.52