Finding the Fourth Proportional to 10,087.25, 13,920.57 and 5,550.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,087.25 : 13,920.57 = 5,550.12 : x
2. Step 2: Convert to fraction form
   10,087.25/13,920.57 = 5,550.12/x
3. Step 3: Cross multiply
   10,087.25x = 13,920.57 × 5,550.12
4. Step 4: Simplify right side
   10,087.25x = 77,260,833.97
5. Step 5: Solve for x
   x = 77,260,833.97/10,087.25
6. Step 6: Final answer
   x = 7,659.26