Finding the Fourth Proportional to 11,143.08, 16,716.47 and 5,297.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,143.08 : 16,716.47 = 5,297.72 : x
2. Step 2: Convert to fraction form
   11,143.08/16,716.47 = 5,297.72/x
3. Step 3: Cross multiply
   11,143.08x = 16,716.47 × 5,297.72
4. Step 4: Simplify right side
   11,143.08x = 88,559,067.38
5. Step 5: Solve for x
   x = 88,559,067.38/11,143.08
6. Step 6: Final answer
   x = 7,947.45