Finding the Fourth Proportional to 12,944.72, 17,865.76 and 7,911.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,944.72 : 17,865.76 = 7,911.86 : x
2. Step 2: Convert to fraction form
   12,944.72/17,865.76 = 7,911.86/x
3. Step 3: Cross multiply
   12,944.72x = 17,865.76 × 7,911.86
4. Step 4: Simplify right side
   12,944.72x = 141,351,391.91
5. Step 5: Solve for x
   x = 141,351,391.91/12,944.72
6. Step 6: Final answer
   x = 10,919.62