Finding the Fourth Proportional to 9,900.43, 13,662.88 and 5,424.57

Step by Step Solution

1. Step 1: Write the proportion equation
   9,900.43 : 13,662.88 = 5,424.57 : x
2. Step 2: Convert to fraction form
   9,900.43/13,662.88 = 5,424.57/x
3. Step 3: Cross multiply
   9,900.43x = 13,662.88 × 5,424.57
4. Step 4: Simplify right side
   9,900.43x = 74,115,235.40
5. Step 5: Solve for x
   x = 74,115,235.40/9,900.43
6. Step 6: Final answer
   x = 7,486.06