Finding the Third Proportional to 31,423.50 and 67,766.63

Step by Step Solution

1. Step 1: Write the proportion equation
   31,423.50 : 67,766.63 = 67,766.63 : x
2. Step 2: Convert to fraction form
   31,423.50/67,766.63 = 67,766.63/x
3. Step 3: Cross multiply
   31,423.50x = 67,766.63 × 67,766.63
4. Step 4: Simplify right side
   31,423.50x = 4,592,315,463.89
5. Step 5: Solve for x
   x = 4,592,315,463.89/31,423.50
6. Step 6: Final answer
   x = 146,142.71