Finding the Fourth Proportional to 9,402.86, 12,975.58 and 5,424.68

Step by Step Solution

1. Step 1: Write the proportion equation
   9,402.86 : 12,975.58 = 5,424.68 : x
2. Step 2: Convert to fraction form
   9,402.86/12,975.58 = 5,424.68/x
3. Step 3: Cross multiply
   9,402.86x = 12,975.58 × 5,424.68
4. Step 4: Simplify right side
   9,402.86x = 70,388,369.31
5. Step 5: Solve for x
   x = 70,388,369.31/9,402.86
6. Step 6: Final answer
   x = 7,485.85