Finding the Fourth Proportional to 11,758.43, 17,639.42 and 3,439.01

Step by Step Solution

1. Step 1: Write the proportion equation
   11,758.43 : 17,639.42 = 3,439.01 : x
2. Step 2: Convert to fraction form
   11,758.43/17,639.42 = 3,439.01/x
3. Step 3: Cross multiply
   11,758.43x = 17,639.42 × 3,439.01
4. Step 4: Simplify right side
   11,758.43x = 60,662,168.68
5. Step 5: Solve for x
   x = 60,662,168.68/11,758.43
6. Step 6: Final answer
   x = 5,159.04