Finding the Third Proportional to 438,216 and 673,153.50

Step by Step Solution

1. Step 1: Write the proportion equation
   438,216 : 673,153.50 = 673,153.50 : x
2. Step 2: Convert to fraction form
   438,216/673,153.50 = 673,153.50/x
3. Step 3: Cross multiply
   438,216x = 673,153.50 × 673,153.50
4. Step 4: Simplify right side
   438,216x = 453,135,634,562.25
5. Step 5: Solve for x
   x = 453,135,634,562.25/438,216
6. Step 6: Final answer
   x = 1,034,046.30