Finding the Fourth Proportional to 11,620.69, 16,078.77 and 10,131.71

Step by Step Solution

1. Step 1: Write the proportion equation
   11,620.69 : 16,078.77 = 10,131.71 : x
2. Step 2: Convert to fraction form
   11,620.69/16,078.77 = 10,131.71/x
3. Step 3: Cross multiply
   11,620.69x = 16,078.77 × 10,131.71
4. Step 4: Simplify right side
   11,620.69x = 162,905,354.40
5. Step 5: Solve for x
   x = 162,905,354.40/11,620.69
6. Step 6: Final answer
   x = 14,018.56