Finding the Fourth Proportional to 13,608.18, 20,409.17 and 3,748.32

Step by Step Solution

1. Step 1: Write the proportion equation
   13,608.18 : 20,409.17 = 3,748.32 : x
2. Step 2: Convert to fraction form
   13,608.18/20,409.17 = 3,748.32/x
3. Step 3: Cross multiply
   13,608.18x = 20,409.17 × 3,748.32
4. Step 4: Simplify right side
   13,608.18x = 76,500,081.35
5. Step 5: Solve for x
   x = 76,500,081.35/13,608.18
6. Step 6: Final answer
   x = 5,621.62