Finding the Third Proportional to 31,200.50 and 71,665.25

Step by Step Solution

1. Step 1: Write the proportion equation
   31,200.50 : 71,665.25 = 71,665.25 : x
2. Step 2: Convert to fraction form
   31,200.50/71,665.25 = 71,665.25/x
3. Step 3: Cross multiply
   31,200.50x = 71,665.25 × 71,665.25
4. Step 4: Simplify right side
   31,200.50x = 5,135,908,057.56
5. Step 5: Solve for x
   x = 5,135,908,057.56/31,200.50
6. Step 6: Final answer
   x = 164,609.80