Finding the Fourth Proportional to 10,857.90, 16,286.91 and 3,066.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,857.90 : 16,286.91 = 3,066.72 : x
2. Step 2: Convert to fraction form
   10,857.90/16,286.91 = 3,066.72/x
3. Step 3: Cross multiply
   10,857.90x = 16,286.91 × 3,066.72
4. Step 4: Simplify right side
   10,857.90x = 49,947,392.64
5. Step 5: Solve for x
   x = 49,947,392.64/10,857.90
6. Step 6: Final answer
   x = 4,600.10