Finding the Fourth Proportional to 12,944.56, 17,865.42 and 7,911.70

Step by Step Solution

1. Step 1: Write the proportion equation
   12,944.56 : 17,865.42 = 7,911.70 : x
2. Step 2: Convert to fraction form
   12,944.56/17,865.42 = 7,911.70/x
3. Step 3: Cross multiply
   12,944.56x = 17,865.42 × 7,911.70
4. Step 4: Simplify right side
   12,944.56x = 141,345,843.41
5. Step 5: Solve for x
   x = 141,345,843.41/12,944.56
6. Step 6: Final answer
   x = 10,919.32