Finding the Third Proportional to 356,200.50 and 501,621

Step by Step Solution

1. Step 1: Write the proportion equation
   356,200.50 : 501,621 = 501,621 : x
2. Step 2: Convert to fraction form
   356,200.50/501,621 = 501,621/x
3. Step 3: Cross multiply
   356,200.50x = 501,621 × 501,621
4. Step 4: Simplify right side
   356,200.50x = 251,623,627,641
5. Step 5: Solve for x
   x = 251,623,627,641/356,200.50
6. Step 6: Final answer
   x = 706,410.09