Finding the Third Proportional to 403,830 and 625,215.38

Step by Step Solution

1. Step 1: Write the proportion equation
   403,830 : 625,215.38 = 625,215.38 : x
2. Step 2: Convert to fraction form
   403,830/625,215.38 = 625,215.38/x
3. Step 3: Cross multiply
   403,830x = 625,215.38 × 625,215.38
4. Step 4: Simplify right side
   403,830x = 390,894,265,136.39
5. Step 5: Solve for x
   x = 390,894,265,136.39/403,830
6. Step 6: Final answer
   x = 967,967.38