Finding the Fourth Proportional to 11,137.10, 16,578.39 and 10,971

Step by Step Solution

1. Step 1: Write the proportion equation
   11,137.10 : 16,578.39 = 10,971 : x
2. Step 2: Convert to fraction form
   11,137.10/16,578.39 = 10,971/x
3. Step 3: Cross multiply
   11,137.10x = 16,578.39 × 10,971
4. Step 4: Simplify right side
   11,137.10x = 181,881,516.69
5. Step 5: Solve for x
   x = 181,881,516.69/11,137.10
6. Step 6: Final answer
   x = 16,331.14