Finding the Fourth Proportional to 14,287.85, 19,716.78 and 7,914.18

Step by Step Solution

1. Step 1: Write the proportion equation
   14,287.85 : 19,716.78 = 7,914.18 : x
2. Step 2: Convert to fraction form
   14,287.85/19,716.78 = 7,914.18/x
3. Step 3: Cross multiply
   14,287.85x = 19,716.78 × 7,914.18
4. Step 4: Simplify right side
   14,287.85x = 156,042,145.94
5. Step 5: Solve for x
   x = 156,042,145.94/14,287.85
6. Step 6: Final answer
   x = 10,921.32