Finding the Fourth Proportional to 105,754.56, 145,938.72 and 68,028.72

Step by Step Solution

1. Step 1: Write the proportion equation
   105,754.56 : 145,938.72 = 68,028.72 : x
2. Step 2: Convert to fraction form
   105,754.56/145,938.72 = 68,028.72/x
3. Step 3: Cross multiply
   105,754.56x = 145,938.72 × 68,028.72
4. Step 4: Simplify right side
   105,754.56x = 9,928,024,320.04
5. Step 5: Solve for x
   x = 9,928,024,320.04/105,754.56
6. Step 6: Final answer
   x = 93,877.98