Finding the Fourth Proportional to 116,580.78, 160,877.88 and 65,596.37

Step by Step Solution

1. Step 1: Write the proportion equation
   116,580.78 : 160,877.88 = 65,596.37 : x
2. Step 2: Convert to fraction form
   116,580.78/160,877.88 = 65,596.37/x
3. Step 3: Cross multiply
   116,580.78x = 160,877.88 × 65,596.37
4. Step 4: Simplify right side
   116,580.78x = 10,553,004,136.91
5. Step 5: Solve for x
   x = 10,553,004,136.91/116,580.78
6. Step 6: Final answer
   x = 90,520.96