Finding the Fourth Proportional to 116,687.50, 161,029.56 and 66,386.50

Step by Step Solution

1. Step 1: Write the proportion equation
   116,687.50 : 161,029.56 = 66,386.50 : x
2. Step 2: Convert to fraction form
   116,687.50/161,029.56 = 66,386.50/x
3. Step 3: Cross multiply
   116,687.50x = 161,029.56 × 66,386.50
4. Step 4: Simplify right side
   116,687.50x = 10,690,188,884.94
5. Step 5: Solve for x
   x = 10,690,188,884.94/116,687.50
6. Step 6: Final answer
   x = 91,613.83