Finding the Third Proportional to 445,036.50 and 689,544

Step by Step Solution

1. Step 1: Write the proportion equation
   445,036.50 : 689,544 = 689,544 : x
2. Step 2: Convert to fraction form
   445,036.50/689,544 = 689,544/x
3. Step 3: Cross multiply
   445,036.50x = 689,544 × 689,544
4. Step 4: Simplify right side
   445,036.50x = 475,470,927,936
5. Step 5: Solve for x
   x = 475,470,927,936/445,036.50
6. Step 6: Final answer
   x = 1,068,386.36