Finding the Fourth Proportional to 39,141.69, 58,722.25 and 11,439.69

Step by Step Solution

1. Step 1: Write the proportion equation
   39,141.69 : 58,722.25 = 11,439.69 : x
2. Step 2: Convert to fraction form
   39,141.69/58,722.25 = 11,439.69/x
3. Step 3: Cross multiply
   39,141.69x = 58,722.25 × 11,439.69
4. Step 4: Simplify right side
   39,141.69x = 671,764,336.10
5. Step 5: Solve for x
   x = 671,764,336.10/39,141.69
6. Step 6: Final answer
   x = 17,162.37