Finding the Third Proportional to 407,721 and 587,281.50

Step by Step Solution

1. Step 1: Write the proportion equation
   407,721 : 587,281.50 = 587,281.50 : x
2. Step 2: Convert to fraction form
   407,721/587,281.50 = 587,281.50/x
3. Step 3: Cross multiply
   407,721x = 587,281.50 × 587,281.50
4. Step 4: Simplify right side
   407,721x = 344,899,560,242.25
5. Step 5: Solve for x
   x = 344,899,560,242.25/407,721
6. Step 6: Final answer
   x = 845,920.52