Finding the Third Proportional to 153,049.50 and 324,624

Step by Step Solution

1. Step 1: Write the proportion equation
   153,049.50 : 324,624 = 324,624 : x
2. Step 2: Convert to fraction form
   153,049.50/324,624 = 324,624/x
3. Step 3: Cross multiply
   153,049.50x = 324,624 × 324,624
4. Step 4: Simplify right side
   153,049.50x = 105,380,741,376
5. Step 5: Solve for x
   x = 105,380,741,376/153,049.50
6. Step 6: Final answer
   x = 688,540.25