Finding the Fourth Proportional to 105,781.59, 145,949.46 and 68,077.71

Step by Step Solution

1. Step 1: Write the proportion equation
   105,781.59 : 145,949.46 = 68,077.71 : x
2. Step 2: Convert to fraction form
   105,781.59/145,949.46 = 68,077.71/x
3. Step 3: Cross multiply
   105,781.59x = 145,949.46 × 68,077.71
4. Step 4: Simplify right side
   105,781.59x = 9,935,905,012.54
5. Step 5: Solve for x
   x = 9,935,905,012.54/105,781.59
6. Step 6: Final answer
   x = 93,928.49