Finding the Fourth Proportional to 105,756.72, 145,914.72 and 68,052.88

Step by Step Solution

1. Step 1: Write the proportion equation
   105,756.72 : 145,914.72 = 68,052.88 : x
2. Step 2: Convert to fraction form
   105,756.72/145,914.72 = 68,052.88/x
3. Step 3: Cross multiply
   105,756.72x = 145,914.72 × 68,052.88
4. Step 4: Simplify right side
   105,756.72x = 9,929,916,930.39
5. Step 5: Solve for x
   x = 9,929,916,930.39/105,756.72
6. Step 6: Final answer
   x = 93,893.96