Finding the Fourth Proportional to 12,945.92, 17,863.68 and 7,356.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,945.92 : 17,863.68 = 7,356.80 : x
2. Step 2: Convert to fraction form
   12,945.92/17,863.68 = 7,356.80/x
3. Step 3: Cross multiply
   12,945.92x = 17,863.68 × 7,356.80
4. Step 4: Simplify right side
   12,945.92x = 131,419,521.02
5. Step 5: Solve for x
   x = 131,419,521.02/12,945.92
6. Step 6: Final answer
   x = 10,151.42