Finding the Fourth Proportional to 9,426.84, 13,009.50 and 5,449.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,426.84 : 13,009.50 = 5,449.20 : x
2. Step 2: Convert to fraction form
   9,426.84/13,009.50 = 5,449.20/x
3. Step 3: Cross multiply
   9,426.84x = 13,009.50 × 5,449.20
4. Step 4: Simplify right side
   9,426.84x = 70,891,367.40
5. Step 5: Solve for x
   x = 70,891,367.40/9,426.84
6. Step 6: Final answer
   x = 7,520.16