Finding the Third Proportional to 420,613 and 635,931.38

Step by Step Solution

1. Step 1: Write the proportion equation
   420,613 : 635,931.38 = 635,931.38 : x
2. Step 2: Convert to fraction form
   420,613/635,931.38 = 635,931.38/x
3. Step 3: Cross multiply
   420,613x = 635,931.38 × 635,931.38
4. Step 4: Simplify right side
   420,613x = 404,408,713,709.39
5. Step 5: Solve for x
   x = 404,408,713,709.39/420,613
6. Step 6: Final answer
   x = 961,474.59