Finding the Fourth Proportional to 9,009.42, 12,429.61 and 5,472.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,009.42 : 12,429.61 = 5,472.55 : x
2. Step 2: Convert to fraction form
   9,009.42/12,429.61 = 5,472.55/x
3. Step 3: Cross multiply
   9,009.42x = 12,429.61 × 5,472.55
4. Step 4: Simplify right side
   9,009.42x = 68,021,662.21
5. Step 5: Solve for x
   x = 68,021,662.21/9,009.42
6. Step 6: Final answer
   x = 7,550.06