Finding the Fourth Proportional to 105,980.61, 159,105.81 and 68,696.70

Step by Step Solution

1. Step 1: Write the proportion equation
   105,980.61 : 159,105.81 = 68,696.70 : x
2. Step 2: Convert to fraction form
   105,980.61/159,105.81 = 68,696.70/x
3. Step 3: Cross multiply
   105,980.61x = 159,105.81 × 68,696.70
4. Step 4: Simplify right side
   105,980.61x = 10,930,044,097.83
5. Step 5: Solve for x
   x = 10,930,044,097.83/105,980.61
6. Step 6: Final answer
   x = 103,132.49