Finding the Fourth Proportional to 10,809.25, 14,920.81 and 8,414.48

Step by Step Solution

1. Step 1: Write the proportion equation
   10,809.25 : 14,920.81 = 8,414.48 : x
2. Step 2: Convert to fraction form
   10,809.25/14,920.81 = 8,414.48/x
3. Step 3: Cross multiply
   10,809.25x = 14,920.81 × 8,414.48
4. Step 4: Simplify right side
   10,809.25x = 125,550,873.59
5. Step 5: Solve for x
   x = 125,550,873.59/10,809.25
6. Step 6: Final answer
   x = 11,615.14