Finding the Third Proportional to 155,401.50 and 321,846

Step by Step Solution

1. Step 1: Write the proportion equation
   155,401.50 : 321,846 = 321,846 : x
2. Step 2: Convert to fraction form
   155,401.50/321,846 = 321,846/x
3. Step 3: Cross multiply
   155,401.50x = 321,846 × 321,846
4. Step 4: Simplify right side
   155,401.50x = 103,584,847,716
5. Step 5: Solve for x
   x = 103,584,847,716/155,401.50
6. Step 6: Final answer
   x = 666,562.73