Finding the Third Proportional to 451,683 and 613,139

Step by Step Solution

1. Step 1: Write the proportion equation
   451,683 : 613,139 = 613,139 : x
2. Step 2: Convert to fraction form
   451,683/613,139 = 613,139/x
3. Step 3: Cross multiply
   451,683x = 613,139 × 613,139
4. Step 4: Simplify right side
   451,683x = 375,939,433,321
5. Step 5: Solve for x
   x = 375,939,433,321/451,683
6. Step 6: Final answer
   x = 832,308.13