Finding the Third Proportional to 445,638 and 658,628.50

Step by Step Solution

1. Step 1: Write the proportion equation
   445,638 : 658,628.50 = 658,628.50 : x
2. Step 2: Convert to fraction form
   445,638/658,628.50 = 658,628.50/x
3. Step 3: Cross multiply
   445,638x = 658,628.50 × 658,628.50
4. Step 4: Simplify right side
   445,638x = 433,791,501,012.25
5. Step 5: Solve for x
   x = 433,791,501,012.25/445,638
6. Step 6: Final answer
   x = 973,416.77