Finding the Fourth Proportional to 10,786.74, 16,189.31 and 4,217.55

Step by Step Solution

1. Step 1: Write the proportion equation
   10,786.74 : 16,189.31 = 4,217.55 : x
2. Step 2: Convert to fraction form
   10,786.74/16,189.31 = 4,217.55/x
3. Step 3: Cross multiply
   10,786.74x = 16,189.31 × 4,217.55
4. Step 4: Simplify right side
   10,786.74x = 68,279,224.39
5. Step 5: Solve for x
   x = 68,279,224.39/10,786.74
6. Step 6: Final answer
   x = 6,329.92