Finding the Third Proportional to 57,986.40 and 89,785.37

Step by Step Solution

1. Step 1: Write the proportion equation
   57,986.40 : 89,785.37 = 89,785.37 : x
2. Step 2: Convert to fraction form
   57,986.40/89,785.37 = 89,785.37/x
3. Step 3: Cross multiply
   57,986.40x = 89,785.37 × 89,785.37
4. Step 4: Simplify right side
   57,986.40x = 8,061,412,097.97
5. Step 5: Solve for x
   x = 8,061,412,097.97/57,986.40
6. Step 6: Final answer
   x = 139,022.46