Finding the Third Proportional to 428,613 and 587,745.50

Step by Step Solution

1. Step 1: Write the proportion equation
   428,613 : 587,745.50 = 587,745.50 : x
2. Step 2: Convert to fraction form
   428,613/587,745.50 = 587,745.50/x
3. Step 3: Cross multiply
   428,613x = 587,745.50 × 587,745.50
4. Step 4: Simplify right side
   428,613x = 345,444,772,770.25
5. Step 5: Solve for x
   x = 345,444,772,770.25/428,613
6. Step 6: Final answer
   x = 805,959.63