Finding the Third Proportional to 406,839 and 613,228.50

Step by Step Solution

1. Step 1: Write the proportion equation
   406,839 : 613,228.50 = 613,228.50 : x
2. Step 2: Convert to fraction form
   406,839/613,228.50 = 613,228.50/x
3. Step 3: Cross multiply
   406,839x = 613,228.50 × 613,228.50
4. Step 4: Simplify right side
   406,839x = 376,049,193,212.25
5. Step 5: Solve for x
   x = 376,049,193,212.25/406,839
6. Step 6: Final answer
   x = 924,319.43