Finding the Fourth Proportional to 115,962.50, 160,028.25 and 65,661.50

Step by Step Solution

1. Step 1: Write the proportion equation
   115,962.50 : 160,028.25 = 65,661.50 : x
2. Step 2: Convert to fraction form
   115,962.50/160,028.25 = 65,661.50/x
3. Step 3: Cross multiply
   115,962.50x = 160,028.25 × 65,661.50
4. Step 4: Simplify right side
   115,962.50x = 10,507,694,937.38
5. Step 5: Solve for x
   x = 10,507,694,937.38/115,962.50
6. Step 6: Final answer
   x = 90,612.87