Finding the Third Proportional to 146,011.50 and 316,809

Step by Step Solution

1. Step 1: Write the proportion equation
   146,011.50 : 316,809 = 316,809 : x
2. Step 2: Convert to fraction form
   146,011.50/316,809 = 316,809/x
3. Step 3: Cross multiply
   146,011.50x = 316,809 × 316,809
4. Step 4: Simplify right side
   146,011.50x = 100,367,942,481
5. Step 5: Solve for x
   x = 100,367,942,481/146,011.50
6. Step 6: Final answer
   x = 687,397.52