Finding the Third Proportional to 57,706.50 and 86,939.25

Step by Step Solution

1. Step 1: Write the proportion equation
   57,706.50 : 86,939.25 = 86,939.25 : x
2. Step 2: Convert to fraction form
   57,706.50/86,939.25 = 86,939.25/x
3. Step 3: Cross multiply
   57,706.50x = 86,939.25 × 86,939.25
4. Step 4: Simplify right side
   57,706.50x = 7,558,433,190.56
5. Step 5: Solve for x
   x = 7,558,433,190.56/57,706.50
6. Step 6: Final answer
   x = 130,980.62