Finding the Third Proportional to 291,121.50 and 636,552

Step by Step Solution

1. Step 1: Write the proportion equation
   291,121.50 : 636,552 = 636,552 : x
2. Step 2: Convert to fraction form
   291,121.50/636,552 = 636,552/x
3. Step 3: Cross multiply
   291,121.50x = 636,552 × 636,552
4. Step 4: Simplify right side
   291,121.50x = 405,198,448,704
5. Step 5: Solve for x
   x = 405,198,448,704/291,121.50
6. Step 6: Final answer
   x = 1,391,853.40