Finding the Fourth Proportional to 11,086.87, 16,630.43 and 3,691.31

Step by Step Solution

1. Step 1: Write the proportion equation
   11,086.87 : 16,630.43 = 3,691.31 : x
2. Step 2: Convert to fraction form
   11,086.87/16,630.43 = 3,691.31/x
3. Step 3: Cross multiply
   11,086.87x = 16,630.43 × 3,691.31
4. Step 4: Simplify right side
   11,086.87x = 61,388,095.68
5. Step 5: Solve for x
   x = 61,388,095.68/11,086.87
6. Step 6: Final answer
   x = 5,537.01