Finding the Third Proportional to 445,419 and 717,153.75

Step by Step Solution

1. Step 1: Write the proportion equation
   445,419 : 717,153.75 = 717,153.75 : x
2. Step 2: Convert to fraction form
   445,419/717,153.75 = 717,153.75/x
3. Step 3: Cross multiply
   445,419x = 717,153.75 × 717,153.75
4. Step 4: Simplify right side
   445,419x = 514,309,501,139.06
5. Step 5: Solve for x
   x = 514,309,501,139.06/445,419
6. Step 6: Final answer
   x = 1,154,664.49