Finding the Third Proportional to 403,517 and 608,300

Step by Step Solution

1. Step 1: Write the proportion equation
   403,517 : 608,300 = 608,300 : x
2. Step 2: Convert to fraction form
   403,517/608,300 = 608,300/x
3. Step 3: Cross multiply
   403,517x = 608,300 × 608,300
4. Step 4: Simplify right side
   403,517x = 370,028,890,000
5. Step 5: Solve for x
   x = 370,028,890,000/403,517
6. Step 6: Final answer
   x = 917,009.42