Finding the Fourth Proportional to 11,331.83, 16,991.91 and 5,086.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,331.83 : 16,991.91 = 5,086.50 : x
2. Step 2: Convert to fraction form
   11,331.83/16,991.91 = 5,086.50/x
3. Step 3: Cross multiply
   11,331.83x = 16,991.91 × 5,086.50
4. Step 4: Simplify right side
   11,331.83x = 86,429,286.50
5. Step 5: Solve for x
   x = 86,429,286.50/11,331.83
6. Step 6: Final answer
   x = 7,627.12