Finding the Third Proportional to 31,722.75 and 67,561.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,722.75 : 67,561.50 = 67,561.50 : x
2. Step 2: Convert to fraction form
   31,722.75/67,561.50 = 67,561.50/x
3. Step 3: Cross multiply
   31,722.75x = 67,561.50 × 67,561.50
4. Step 4: Simplify right side
   31,722.75x = 4,564,556,282.25
5. Step 5: Solve for x
   x = 4,564,556,282.25/31,722.75
6. Step 6: Final answer
   x = 143,889.05