Finding the Fourth Proportional to 11,691.29, 17,537.83 and 3,900.11

Step by Step Solution

1. Step 1: Write the proportion equation
   11,691.29 : 17,537.83 = 3,900.11 : x
2. Step 2: Convert to fraction form
   11,691.29/17,537.83 = 3,900.11/x
3. Step 3: Cross multiply
   11,691.29x = 17,537.83 × 3,900.11
4. Step 4: Simplify right side
   11,691.29x = 68,399,368.72
5. Step 5: Solve for x
   x = 68,399,368.72/11,691.29
6. Step 6: Final answer
   x = 5,850.45