Finding the Fourth Proportional to 12,417.92, 17,136.72 and 7,112.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,417.92 : 17,136.72 = 7,112.48 : x
2. Step 2: Convert to fraction form
   12,417.92/17,136.72 = 7,112.48/x
3. Step 3: Cross multiply
   12,417.92x = 17,136.72 × 7,112.48
4. Step 4: Simplify right side
   12,417.92x = 121,884,578.27
5. Step 5: Solve for x
   x = 121,884,578.27/12,417.92
6. Step 6: Final answer
   x = 9,815.22