Finding the Third Proportional to 290,403 and 622,843.50

Step by Step Solution

1. Step 1: Write the proportion equation
   290,403 : 622,843.50 = 622,843.50 : x
2. Step 2: Convert to fraction form
   290,403/622,843.50 = 622,843.50/x
3. Step 3: Cross multiply
   290,403x = 622,843.50 × 622,843.50
4. Step 4: Simplify right side
   290,403x = 387,934,025,492.25
5. Step 5: Solve for x
   x = 387,934,025,492.25/290,403
6. Step 6: Final answer
   x = 1,335,847.17