Finding the Third Proportional to 209,800.50 and 316,443

Step by Step Solution

1. Step 1: Write the proportion equation
   209,800.50 : 316,443 = 316,443 : x
2. Step 2: Convert to fraction form
   209,800.50/316,443 = 316,443/x
3. Step 3: Cross multiply
   209,800.50x = 316,443 × 316,443
4. Step 4: Simplify right side
   209,800.50x = 100,136,172,249
5. Step 5: Solve for x
   x = 100,136,172,249/209,800.50
6. Step 6: Final answer
   x = 477,292.34