Finding the Fourth Proportional to 9,005.23, 12,427.39 and 5,228.71

Step by Step Solution

1. Step 1: Write the proportion equation
   9,005.23 : 12,427.39 = 5,228.71 : x
2. Step 2: Convert to fraction form
   9,005.23/12,427.39 = 5,228.71/x
3. Step 3: Cross multiply
   9,005.23x = 12,427.39 × 5,228.71
4. Step 4: Simplify right side
   9,005.23x = 64,979,156.23
5. Step 5: Solve for x
   x = 64,979,156.23/9,005.23
6. Step 6: Final answer
   x = 7,215.71