Finding the Fourth Proportional to 12,648.31, 17,455.23 and 7,272.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,648.31 : 17,455.23 = 7,272.49 : x
2. Step 2: Convert to fraction form
   12,648.31/17,455.23 = 7,272.49/x
3. Step 3: Cross multiply
   12,648.31x = 17,455.23 × 7,272.49
4. Step 4: Simplify right side
   12,648.31x = 126,942,861.98
5. Step 5: Solve for x
   x = 126,942,861.98/12,648.31
6. Step 6: Final answer
   x = 10,036.35