Finding the Third Proportional to 403,515 and 608,296.50

Step by Step Solution

1. Step 1: Write the proportion equation
   403,515 : 608,296.50 = 608,296.50 : x
2. Step 2: Convert to fraction form
   403,515/608,296.50 = 608,296.50/x
3. Step 3: Cross multiply
   403,515x = 608,296.50 × 608,296.50
4. Step 4: Simplify right side
   403,515x = 370,024,631,912.25
5. Step 5: Solve for x
   x = 370,024,631,912.25/403,515
6. Step 6: Final answer
   x = 917,003.41