Finding the Fourth Proportional to 13,440.76, 20,162.04 and 3,580.12

Step by Step Solution

1. Step 1: Write the proportion equation
   13,440.76 : 20,162.04 = 3,580.12 : x
2. Step 2: Convert to fraction form
   13,440.76/20,162.04 = 3,580.12/x
3. Step 3: Cross multiply
   13,440.76x = 20,162.04 × 3,580.12
4. Step 4: Simplify right side
   13,440.76x = 72,182,561.27
5. Step 5: Solve for x
   x = 72,182,561.27/13,440.76
6. Step 6: Final answer
   x = 5,370.42