Finding the Fourth Proportional to 9,900.41, 13,662.59 and 5,424.35

Step by Step Solution

1. Step 1: Write the proportion equation
   9,900.41 : 13,662.59 = 5,424.35 : x
2. Step 2: Convert to fraction form
   9,900.41/13,662.59 = 5,424.35/x
3. Step 3: Cross multiply
   9,900.41x = 13,662.59 × 5,424.35
4. Step 4: Simplify right side
   9,900.41x = 74,110,574.63
5. Step 5: Solve for x
   x = 74,110,574.63/9,900.41
6. Step 6: Final answer
   x = 7,485.61