Finding the Fourth Proportional to 9,419.79, 12,999.24 and 5,441.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,419.79 : 12,999.24 = 5,441.28 : x
2. Step 2: Convert to fraction form
   9,419.79/12,999.24 = 5,441.28/x
3. Step 3: Cross multiply
   9,419.79x = 12,999.24 × 5,441.28
4. Step 4: Simplify right side
   9,419.79x = 70,732,504.63
5. Step 5: Solve for x
   x = 70,732,504.63/9,419.79
6. Step 6: Final answer
   x = 7,508.93