Finding the Fourth Proportional to 116,046.72, 160,144.20 and 65,745.72

Step by Step Solution

1. Step 1: Write the proportion equation
   116,046.72 : 160,144.20 = 65,745.72 : x
2. Step 2: Convert to fraction form
   116,046.72/160,144.20 = 65,745.72/x
3. Step 3: Cross multiply
   116,046.72x = 160,144.20 × 65,745.72
4. Step 4: Simplify right side
   116,046.72x = 10,528,795,732.82
5. Step 5: Solve for x
   x = 10,528,795,732.82/116,046.72
6. Step 6: Final answer
   x = 90,728.94