Finding the Fourth Proportional to 116,991.92, 161,456.22 and 65,986.04

Step by Step Solution

1. Step 1: Write the proportion equation
   116,991.92 : 161,456.22 = 65,986.04 : x
2. Step 2: Convert to fraction form
   116,991.92/161,456.22 = 65,986.04/x
3. Step 3: Cross multiply
   116,991.92x = 161,456.22 × 65,986.04
4. Step 4: Simplify right side
   116,991.92x = 10,653,856,591.17
5. Step 5: Solve for x
   x = 10,653,856,591.17/116,991.92
6. Step 6: Final answer
   x = 91,064.89