Finding the Third Proportional to 291,211.50 and 636,303

Step by Step Solution

1. Step 1: Write the proportion equation
   291,211.50 : 636,303 = 636,303 : x
2. Step 2: Convert to fraction form
   291,211.50/636,303 = 636,303/x
3. Step 3: Cross multiply
   291,211.50x = 636,303 × 636,303
4. Step 4: Simplify right side
   291,211.50x = 404,881,507,809
5. Step 5: Solve for x
   x = 404,881,507,809/291,211.50
6. Step 6: Final answer
   x = 1,390,334.89