Finding the Fourth Proportional to 9,386.37, 12,952.75 and 5,408.05

Step by Step Solution

1. Step 1: Write the proportion equation
   9,386.37 : 12,952.75 = 5,408.05 : x
2. Step 2: Convert to fraction form
   9,386.37/12,952.75 = 5,408.05/x
3. Step 3: Cross multiply
   9,386.37x = 12,952.75 × 5,408.05
4. Step 4: Simplify right side
   9,386.37x = 70,049,119.64
5. Step 5: Solve for x
   x = 70,049,119.64/9,386.37
6. Step 6: Final answer
   x = 7,462.86