Finding the Fourth Proportional to 105,980.24, 159,105.24 and 68,696.32

Step by Step Solution

1. Step 1: Write the proportion equation
   105,980.24 : 159,105.24 = 68,696.32 : x
2. Step 2: Convert to fraction form
   105,980.24/159,105.24 = 68,696.32/x
3. Step 3: Cross multiply
   105,980.24x = 159,105.24 × 68,696.32
4. Step 4: Simplify right side
   105,980.24x = 10,929,944,480.72
5. Step 5: Solve for x
   x = 10,929,944,480.72/105,980.24
6. Step 6: Final answer
   x = 103,131.91