Finding the Fourth Proportional to 9,005.30, 12,426.91 and 5,228.17

Step by Step Solution

1. Step 1: Write the proportion equation
   9,005.30 : 12,426.91 = 5,228.17 : x
2. Step 2: Convert to fraction form
   9,005.30/12,426.91 = 5,228.17/x
3. Step 3: Cross multiply
   9,005.30x = 12,426.91 × 5,228.17
4. Step 4: Simplify right side
   9,005.30x = 64,969,953.92
5. Step 5: Solve for x
   x = 64,969,953.92/9,005.30
6. Step 6: Final answer
   x = 7,214.64