Finding the Third Proportional to 146,245.50 and 317,520

Step by Step Solution

1. Step 1: Write the proportion equation
   146,245.50 : 317,520 = 317,520 : x
2. Step 2: Convert to fraction form
   146,245.50/317,520 = 317,520/x
3. Step 3: Cross multiply
   146,245.50x = 317,520 × 317,520
4. Step 4: Simplify right side
   146,245.50x = 100,818,950,400
5. Step 5: Solve for x
   x = 100,818,950,400/146,245.50
6. Step 6: Final answer
   x = 689,381.56