Finding the Fourth Proportional to 89,639.69, 123,537.98 and 83,951.60

Step by Step Solution

1. Step 1: Write the proportion equation
   89,639.69 : 123,537.98 = 83,951.60 : x
2. Step 2: Convert to fraction form
   89,639.69/123,537.98 = 83,951.60/x
3. Step 3: Cross multiply
   89,639.69x = 123,537.98 × 83,951.60
4. Step 4: Simplify right side
   89,639.69x = 10,371,210,673.96
5. Step 5: Solve for x
   x = 10,371,210,673.96/89,639.69
6. Step 6: Final answer
   x = 115,698.87