Finding the Third Proportional to 403,502 and 604,478.50

Step by Step Solution

1. Step 1: Write the proportion equation
   403,502 : 604,478.50 = 604,478.50 : x
2. Step 2: Convert to fraction form
   403,502/604,478.50 = 604,478.50/x
3. Step 3: Cross multiply
   403,502x = 604,478.50 × 604,478.50
4. Step 4: Simplify right side
   403,502x = 365,394,256,962.25
5. Step 5: Solve for x
   x = 365,394,256,962.25/403,502
6. Step 6: Final answer
   x = 905,557.49