Finding the Fourth Proportional to 12,943.15, 17,860.96 and 7,915.79

Step by Step Solution

1. Step 1: Write the proportion equation
   12,943.15 : 17,860.96 = 7,915.79 : x
2. Step 2: Convert to fraction form
   12,943.15/17,860.96 = 7,915.79/x
3. Step 3: Cross multiply
   12,943.15x = 17,860.96 × 7,915.79
4. Step 4: Simplify right side
   12,943.15x = 141,383,608.56
5. Step 5: Solve for x
   x = 141,383,608.56/12,943.15
6. Step 6: Final answer
   x = 10,923.43