Finding the Fourth Proportional to 13,748.96, 20,609.34 and 5,425.61

Step by Step Solution

1. Step 1: Write the proportion equation
   13,748.96 : 20,609.34 = 5,425.61 : x
2. Step 2: Convert to fraction form
   13,748.96/20,609.34 = 5,425.61/x
3. Step 3: Cross multiply
   13,748.96x = 20,609.34 × 5,425.61
4. Step 4: Simplify right side
   13,748.96x = 111,818,138.15
5. Step 5: Solve for x
   x = 111,818,138.15/13,748.96
6. Step 6: Final answer
   x = 8,132.85