Finding the Fourth Proportional to 9,329.79, 12,869.33 and 5,550.40

Step by Step Solution

1. Step 1: Write the proportion equation
   9,329.79 : 12,869.33 = 5,550.40 : x
2. Step 2: Convert to fraction form
   9,329.79/12,869.33 = 5,550.40/x
3. Step 3: Cross multiply
   9,329.79x = 12,869.33 × 5,550.40
4. Step 4: Simplify right side
   9,329.79x = 71,429,869.31
5. Step 5: Solve for x
   x = 71,429,869.31/9,329.79
6. Step 6: Final answer
   x = 7,656.11