Finding the Fourth Proportional to 9,900.05, 13,662.38 and 5,424.23

Step by Step Solution

1. Step 1: Write the proportion equation
   9,900.05 : 13,662.38 = 5,424.23 : x
2. Step 2: Convert to fraction form
   9,900.05/13,662.38 = 5,424.23/x
3. Step 3: Cross multiply
   9,900.05x = 13,662.38 × 5,424.23
4. Step 4: Simplify right side
   9,900.05x = 74,107,939.18
5. Step 5: Solve for x
   x = 74,107,939.18/9,900.05
6. Step 6: Final answer
   x = 7,485.62