Finding the Fourth Proportional to 8,920.49, 13,365.63 and 5,399.82

Step by Step Solution

1. Step 1: Write the proportion equation
   8,920.49 : 13,365.63 = 5,399.82 : x
2. Step 2: Convert to fraction form
   8,920.49/13,365.63 = 5,399.82/x
3. Step 3: Cross multiply
   8,920.49x = 13,365.63 × 5,399.82
4. Step 4: Simplify right side
   8,920.49x = 72,171,996.19
5. Step 5: Solve for x
   x = 72,171,996.19/8,920.49
6. Step 6: Final answer
   x = 8,090.59