Finding the Third Proportional to 291,066 and 636,242.25

Step by Step Solution

1. Step 1: Write the proportion equation
   291,066 : 636,242.25 = 636,242.25 : x
2. Step 2: Convert to fraction form
   291,066/636,242.25 = 636,242.25/x
3. Step 3: Cross multiply
   291,066x = 636,242.25 × 636,242.25
4. Step 4: Simplify right side
   291,066x = 404,804,200,685.06
5. Step 5: Solve for x
   x = 404,804,200,685.06/291,066
6. Step 6: Final answer
   x = 1,390,764.30