Finding the Fourth Proportional to 9,639.41, 13,301.52 and 5,390.25

Step by Step Solution

1. Step 1: Write the proportion equation
   9,639.41 : 13,301.52 = 5,390.25 : x
2. Step 2: Convert to fraction form
   9,639.41/13,301.52 = 5,390.25/x
3. Step 3: Cross multiply
   9,639.41x = 13,301.52 × 5,390.25
4. Step 4: Simplify right side
   9,639.41x = 71,698,448.09
5. Step 5: Solve for x
   x = 71,698,448.09/9,639.41
6. Step 6: Final answer
   x = 7,438.06