Finding the Third Proportional to 407,851.50 and 620,418

Step by Step Solution

1. Step 1: Write the proportion equation
   407,851.50 : 620,418 = 620,418 : x
2. Step 2: Convert to fraction form
   407,851.50/620,418 = 620,418/x
3. Step 3: Cross multiply
   407,851.50x = 620,418 × 620,418
4. Step 4: Simplify right side
   407,851.50x = 384,918,494,724
5. Step 5: Solve for x
   x = 384,918,494,724/407,851.50
6. Step 6: Final answer
   x = 943,771.19