Finding the Third Proportional to 621,603 and 959,863.50

Step by Step Solution

1. Step 1: Write the proportion equation
   621,603 : 959,863.50 = 959,863.50 : x
2. Step 2: Convert to fraction form
   621,603/959,863.50 = 959,863.50/x
3. Step 3: Cross multiply
   621,603x = 959,863.50 × 959,863.50
4. Step 4: Simplify right side
   621,603x = 921,337,938,632.25
5. Step 5: Solve for x
   x = 921,337,938,632.25/621,603
6. Step 6: Final answer
   x = 1,482,196.74