Finding the Fourth Proportional to 9,005.75, 12,426.03 and 5,228.45

Step by Step Solution

1. Step 1: Write the proportion equation
   9,005.75 : 12,426.03 = 5,228.45 : x
2. Step 2: Convert to fraction form
   9,005.75/12,426.03 = 5,228.45/x
3. Step 3: Cross multiply
   9,005.75x = 12,426.03 × 5,228.45
4. Step 4: Simplify right side
   9,005.75x = 64,968,814.42
5. Step 5: Solve for x
   x = 64,968,814.42/9,005.75
6. Step 6: Final answer
   x = 7,214.15