Finding the Fourth Proportional to 9,005.74, 12,426.65 and 5,229.25

Step by Step Solution

1. Step 1: Write the proportion equation
   9,005.74 : 12,426.65 = 5,229.25 : x
2. Step 2: Convert to fraction form
   9,005.74/12,426.65 = 5,229.25/x
3. Step 3: Cross multiply
   9,005.74x = 12,426.65 × 5,229.25
4. Step 4: Simplify right side
   9,005.74x = 64,982,033.37
5. Step 5: Solve for x
   x = 64,982,033.37/9,005.74
6. Step 6: Final answer
   x = 7,215.62