Finding the Fourth Proportional to 9,362.40, 12,919.05 and 5,384.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,362.40 : 12,919.05 = 5,384.80 : x
2. Step 2: Convert to fraction form
   9,362.40/12,919.05 = 5,384.80/x
3. Step 3: Cross multiply
   9,362.40x = 12,919.05 × 5,384.80
4. Step 4: Simplify right side
   9,362.40x = 69,566,500.44
5. Step 5: Solve for x
   x = 69,566,500.44/9,362.40
6. Step 6: Final answer
   x = 7,430.41