Finding the Third Proportional to 57,705.75 and 86,938.31

Step by Step Solution

1. Step 1: Write the proportion equation
   57,705.75 : 86,938.31 = 86,938.31 : x
2. Step 2: Convert to fraction form
   57,705.75/86,938.31 = 86,938.31/x
3. Step 3: Cross multiply
   57,705.75x = 86,938.31 × 86,938.31
4. Step 4: Simplify right side
   57,705.75x = 7,558,270,180.35
5. Step 5: Solve for x
   x = 7,558,270,180.35/57,705.75
6. Step 6: Final answer
   x = 130,979.50