Finding the Fourth Proportional to 118,728, 163,844.64 and 65,736

Step by Step Solution

1. Step 1: Write the proportion equation
   118,728 : 163,844.64 = 65,736 : x
2. Step 2: Convert to fraction form
   118,728/163,844.64 = 65,736/x
3. Step 3: Cross multiply
   118,728x = 163,844.64 × 65,736
4. Step 4: Simplify right side
   118,728x = 10,770,491,255.04
5. Step 5: Solve for x
   x = 10,770,491,255.04/118,728
6. Step 6: Final answer
   x = 90,715.68