Finding the Fourth Proportional to 118,834.69, 163,989.30 and 65,118.55

Step by Step Solution

1. Step 1: Write the proportion equation
   118,834.69 : 163,989.30 = 65,118.55 : x
2. Step 2: Convert to fraction form
   118,834.69/163,989.30 = 65,118.55/x
3. Step 3: Cross multiply
   118,834.69x = 163,989.30 × 65,118.55
4. Step 4: Simplify right side
   118,834.69x = 10,678,745,431.52
5. Step 5: Solve for x
   x = 10,678,745,431.52/118,834.69
6. Step 6: Final answer
   x = 89,862.19