Finding the Third Proportional to 291,241 and 636,362

Step by Step Solution

1. Step 1: Write the proportion equation
   291,241 : 636,362 = 636,362 : x
2. Step 2: Convert to fraction form
   291,241/636,362 = 636,362/x
3. Step 3: Cross multiply
   291,241x = 636,362 × 636,362
4. Step 4: Simplify right side
   291,241x = 404,956,595,044
5. Step 5: Solve for x
   x = 404,956,595,044/291,241
6. Step 6: Final answer
   x = 1,390,451.88