Finding the Third Proportional to 291,160 and 636,632

Step by Step Solution

1. Step 1: Write the proportion equation
   291,160 : 636,632 = 636,632 : x
2. Step 2: Convert to fraction form
   291,160/636,632 = 636,632/x
3. Step 3: Cross multiply
   291,160x = 636,632 × 636,632
4. Step 4: Simplify right side
   291,160x = 405,300,303,424
5. Step 5: Solve for x
   x = 405,300,303,424/291,160
6. Step 6: Final answer
   x = 1,392,019.18