Finding the Fourth Proportional to 116,205.87, 160,356.99 and 65,209.89

Step by Step Solution

1. Step 1: Write the proportion equation
   116,205.87 : 160,356.99 = 65,209.89 : x
2. Step 2: Convert to fraction form
   116,205.87/160,356.99 = 65,209.89/x
3. Step 3: Cross multiply
   116,205.87x = 160,356.99 × 65,209.89
4. Step 4: Simplify right side
   116,205.87x = 10,456,861,678.63
5. Step 5: Solve for x
   x = 10,456,861,678.63/116,205.87
6. Step 6: Final answer
   x = 89,985.66