Finding the Fourth Proportional to 138,581.56, 207,778.94 and 111,960.30

Step by Step Solution

1. Step 1: Write the proportion equation
   138,581.56 : 207,778.94 = 111,960.30 : x
2. Step 2: Convert to fraction form
   138,581.56/207,778.94 = 111,960.30/x
3. Step 3: Cross multiply
   138,581.56x = 207,778.94 × 111,960.30
4. Step 4: Simplify right side
   138,581.56x = 23,262,992,456.08
5. Step 5: Solve for x
   x = 23,262,992,456.08/138,581.56
6. Step 6: Final answer
   x = 167,864.99