Finding the Third Proportional to 216,603 and 501,403.50

Step by Step Solution

1. Step 1: Write the proportion equation
   216,603 : 501,403.50 = 501,403.50 : x
2. Step 2: Convert to fraction form
   216,603/501,403.50 = 501,403.50/x
3. Step 3: Cross multiply
   216,603x = 501,403.50 × 501,403.50
4. Step 4: Simplify right side
   216,603x = 251,405,469,812.25
5. Step 5: Solve for x
   x = 251,405,469,812.25/216,603
6. Step 6: Final answer
   x = 1,160,674.00