Finding the Fourth Proportional to 11,139.11, 16,709.69 and 3,642.70

Step by Step Solution

1. Step 1: Write the proportion equation
   11,139.11 : 16,709.69 = 3,642.70 : x
2. Step 2: Convert to fraction form
   11,139.11/16,709.69 = 3,642.70/x
3. Step 3: Cross multiply
   11,139.11x = 16,709.69 × 3,642.70
4. Step 4: Simplify right side
   11,139.11x = 60,868,437.43
5. Step 5: Solve for x
   x = 60,868,437.43/11,139.11
6. Step 6: Final answer
   x = 5,464.39