Finding the Fourth Proportional to 13,651.60, 18,831.72 and 8,061.52

Step by Step Solution

1. Step 1: Write the proportion equation
   13,651.60 : 18,831.72 = 8,061.52 : x
2. Step 2: Convert to fraction form
   13,651.60/18,831.72 = 8,061.52/x
3. Step 3: Cross multiply
   13,651.60x = 18,831.72 × 8,061.52
4. Step 4: Simplify right side
   13,651.60x = 151,812,287.41
5. Step 5: Solve for x
   x = 151,812,287.41/13,651.60
6. Step 6: Final answer
   x = 11,120.48