Finding the Fourth Proportional to 14,287.72, 19,716.22 and 7,914.28

Step by Step Solution

1. Step 1: Write the proportion equation
   14,287.72 : 19,716.22 = 7,914.28 : x
2. Step 2: Convert to fraction form
   14,287.72/19,716.22 = 7,914.28/x
3. Step 3: Cross multiply
   14,287.72x = 19,716.22 × 7,914.28
4. Step 4: Simplify right side
   14,287.72x = 156,039,685.62
5. Step 5: Solve for x
   x = 156,039,685.62/14,287.72
6. Step 6: Final answer
   x = 10,921.24