Finding the Third Proportional to 72,145 and 156,612

Step by Step Solution

1. Step 1: Write the proportion equation
   72,145 : 156,612 = 156,612 : x
2. Step 2: Convert to fraction form
   72,145/156,612 = 156,612/x
3. Step 3: Cross multiply
   72,145x = 156,612 × 156,612
4. Step 4: Simplify right side
   72,145x = 24,527,318,544
5. Step 5: Solve for x
   x = 24,527,318,544/72,145
6. Step 6: Final answer
   x = 339,972.54