Finding the Fourth Proportional to 9,900.33, 13,662.60 and 5,424.51

Step by Step Solution

1. Step 1: Write the proportion equation
   9,900.33 : 13,662.60 = 5,424.51 : x
2. Step 2: Convert to fraction form
   9,900.33/13,662.60 = 5,424.51/x
3. Step 3: Cross multiply
   9,900.33x = 13,662.60 × 5,424.51
4. Step 4: Simplify right side
   9,900.33x = 74,112,910.33
5. Step 5: Solve for x
   x = 74,112,910.33/9,900.33
6. Step 6: Final answer
   x = 7,485.90