Finding the Third Proportional to 142,423.50 and 221,412

Step by Step Solution

1. Step 1: Write the proportion equation
   142,423.50 : 221,412 = 221,412 : x
2. Step 2: Convert to fraction form
   142,423.50/221,412 = 221,412/x
3. Step 3: Cross multiply
   142,423.50x = 221,412 × 221,412
4. Step 4: Simplify right side
   142,423.50x = 49,023,273,744
5. Step 5: Solve for x
   x = 49,023,273,744/142,423.50
6. Step 6: Final answer
   x = 344,207.76