Finding the Fourth Proportional to 11,142.32, 16,716.40 and 4,216.88

Step by Step Solution

1. Step 1: Write the proportion equation
   11,142.32 : 16,716.40 = 4,216.88 : x
2. Step 2: Convert to fraction form
   11,142.32/16,716.40 = 4,216.88/x
3. Step 3: Cross multiply
   11,142.32x = 16,716.40 × 4,216.88
4. Step 4: Simplify right side
   11,142.32x = 70,491,052.83
5. Step 5: Solve for x
   x = 70,491,052.83/11,142.32
6. Step 6: Final answer
   x = 6,326.43