Finding the Fourth Proportional to 116,791.25, 161,138.57 and 65,786.09

Step by Step Solution

1. Step 1: Write the proportion equation
   116,791.25 : 161,138.57 = 65,786.09 : x
2. Step 2: Convert to fraction form
   116,791.25/161,138.57 = 65,786.09/x
3. Step 3: Cross multiply
   116,791.25x = 161,138.57 × 65,786.09
4. Step 4: Simplify right side
   116,791.25x = 10,600,675,333.87
5. Step 5: Solve for x
   x = 10,600,675,333.87/116,791.25
6. Step 6: Final answer
   x = 90,766.01