Finding the Fourth Proportional to 105,757.76, 145,945.32 and 65,463.50

Step by Step Solution

1. Step 1: Write the proportion equation
   105,757.76 : 145,945.32 = 65,463.50 : x
2. Step 2: Convert to fraction form
   105,757.76/145,945.32 = 65,463.50/x
3. Step 3: Cross multiply
   105,757.76x = 145,945.32 × 65,463.50
4. Step 4: Simplify right side
   105,757.76x = 9,554,091,455.82
5. Step 5: Solve for x
   x = 9,554,091,455.82/105,757.76
6. Step 6: Final answer
   x = 90,339.39