Finding the Third Proportional to 31,293.42 and 67,621.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,293.42 : 67,621.50 = 67,621.50 : x
2. Step 2: Convert to fraction form
   31,293.42/67,621.50 = 67,621.50/x
3. Step 3: Cross multiply
   31,293.42x = 67,621.50 × 67,621.50
4. Step 4: Simplify right side
   31,293.42x = 4,572,667,262.25
5. Step 5: Solve for x
   x = 4,572,667,262.25/31,293.42
6. Step 6: Final answer
   x = 146,122.32