Finding the Fourth Proportional to 10,216.86, 14,105.79 and 7,974.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,216.86 : 14,105.79 = 7,974.78 : x
2. Step 2: Convert to fraction form
   10,216.86/14,105.79 = 7,974.78/x
3. Step 3: Cross multiply
   10,216.86x = 14,105.79 × 7,974.78
4. Step 4: Simplify right side
   10,216.86x = 112,490,571.98
5. Step 5: Solve for x
   x = 112,490,571.98/10,216.86
6. Step 6: Final answer
   x = 11,010.29