Finding the Third Proportional to 461,421 and 620,851.50

Step by Step Solution

1. Step 1: Write the proportion equation
   461,421 : 620,851.50 = 620,851.50 : x
2. Step 2: Convert to fraction form
   461,421/620,851.50 = 620,851.50/x
3. Step 3: Cross multiply
   461,421x = 620,851.50 × 620,851.50
4. Step 4: Simplify right side
   461,421x = 385,456,585,052.25
5. Step 5: Solve for x
   x = 385,456,585,052.25/461,421
6. Step 6: Final answer
   x = 835,368.54