Finding the Fourth Proportional to 9,629.61, 13,287.24 and 5,380.51

Step by Step Solution

1. Step 1: Write the proportion equation
   9,629.61 : 13,287.24 = 5,380.51 : x
2. Step 2: Convert to fraction form
   9,629.61/13,287.24 = 5,380.51/x
3. Step 3: Cross multiply
   9,629.61x = 13,287.24 × 5,380.51
4. Step 4: Simplify right side
   9,629.61x = 71,492,127.69
5. Step 5: Solve for x
   x = 71,492,127.69/9,629.61
6. Step 6: Final answer
   x = 7,424.20