Finding the Third Proportional to 291,195 and 636,275.25

Step by Step Solution

1. Step 1: Write the proportion equation
   291,195 : 636,275.25 = 636,275.25 : x
2. Step 2: Convert to fraction form
   291,195/636,275.25 = 636,275.25/x
3. Step 3: Cross multiply
   291,195x = 636,275.25 × 636,275.25
4. Step 4: Simplify right side
   291,195x = 404,846,193,762.56
5. Step 5: Solve for x
   x = 404,846,193,762.56/291,195
6. Step 6: Final answer
   x = 1,390,292.39