Finding the Third Proportional to 403,848 and 622,618.50

Step by Step Solution

1. Step 1: Write the proportion equation
   403,848 : 622,618.50 = 622,618.50 : x
2. Step 2: Convert to fraction form
   403,848/622,618.50 = 622,618.50/x
3. Step 3: Cross multiply
   403,848x = 622,618.50 × 622,618.50
4. Step 4: Simplify right side
   403,848x = 387,653,796,542.25
5. Step 5: Solve for x
   x = 387,653,796,542.25/403,848
6. Step 6: Final answer
   x = 959,900.25