Finding the Fourth Proportional to 11,758.05, 17,639.51 and 3,967.47

Step by Step Solution

1. Step 1: Write the proportion equation
   11,758.05 : 17,639.51 = 3,967.47 : x
2. Step 2: Convert to fraction form
   11,758.05/17,639.51 = 3,967.47/x
3. Step 3: Cross multiply
   11,758.05x = 17,639.51 × 3,967.47
4. Step 4: Simplify right side
   11,758.05x = 69,984,206.90
5. Step 5: Solve for x
   x = 69,984,206.90/11,758.05
6. Step 6: Final answer
   x = 5,952.02