Finding the Third Proportional to 57,722.70 and 86,353.40

Step by Step Solution

1. Step 1: Write the proportion equation
   57,722.70 : 86,353.40 = 86,353.40 : x
2. Step 2: Convert to fraction form
   57,722.70/86,353.40 = 86,353.40/x
3. Step 3: Cross multiply
   57,722.70x = 86,353.40 × 86,353.40
4. Step 4: Simplify right side
   57,722.70x = 7,456,909,000.06
5. Step 5: Solve for x
   x = 7,456,909,000.06/57,722.70
6. Step 6: Final answer
   x = 129,185.03