Finding the Fourth Proportional to 11,101.36, 16,658.60 and 4,086.30

Step by Step Solution

1. Step 1: Write the proportion equation
   11,101.36 : 16,658.60 = 4,086.30 : x
2. Step 2: Convert to fraction form
   11,101.36/16,658.60 = 4,086.30/x
3. Step 3: Cross multiply
   11,101.36x = 16,658.60 × 4,086.30
4. Step 4: Simplify right side
   11,101.36x = 68,071,953.89
5. Step 5: Solve for x
   x = 68,071,953.89/11,101.36
6. Step 6: Final answer
   x = 6,131.86