Finding the Fourth Proportional to 8,985.25, 12,399.77 and 5,208.69

Step by Step Solution

1. Step 1: Write the proportion equation
   8,985.25 : 12,399.77 = 5,208.69 : x
2. Step 2: Convert to fraction form
   8,985.25/12,399.77 = 5,208.69/x
3. Step 3: Cross multiply
   8,985.25x = 12,399.77 × 5,208.69
4. Step 4: Simplify right side
   8,985.25x = 64,586,558.00
5. Step 5: Solve for x
   x = 64,586,558.00/8,985.25
6. Step 6: Final answer
   x = 7,188.06