Finding the Fourth Proportional to 116,622.81, 160,940.15 and 65,636.55

Step by Step Solution

1. Step 1: Write the proportion equation
   116,622.81 : 160,940.15 = 65,636.55 : x
2. Step 2: Convert to fraction form
   116,622.81/160,940.15 = 65,636.55/x
3. Step 3: Cross multiply
   116,622.81x = 160,940.15 × 65,636.55
4. Step 4: Simplify right side
   116,622.81x = 10,563,555,874.30
5. Step 5: Solve for x
   x = 10,563,555,874.30/116,622.81
6. Step 6: Final answer
   x = 90,578.81