Finding the Third Proportional to 290,382 and 622,789.50

Step by Step Solution

1. Step 1: Write the proportion equation
   290,382 : 622,789.50 = 622,789.50 : x
2. Step 2: Convert to fraction form
   290,382/622,789.50 = 622,789.50/x
3. Step 3: Cross multiply
   290,382x = 622,789.50 × 622,789.50
4. Step 4: Simplify right side
   290,382x = 387,866,761,310.25
5. Step 5: Solve for x
   x = 387,866,761,310.25/290,382
6. Step 6: Final answer
   x = 1,335,712.14