Finding the Third Proportional to 448,119 and 685,840.50

Step by Step Solution

1. Step 1: Write the proportion equation
   448,119 : 685,840.50 = 685,840.50 : x
2. Step 2: Convert to fraction form
   448,119/685,840.50 = 685,840.50/x
3. Step 3: Cross multiply
   448,119x = 685,840.50 × 685,840.50
4. Step 4: Simplify right side
   448,119x = 470,377,191,440.25
5. Step 5: Solve for x
   x = 470,377,191,440.25/448,119
6. Step 6: Final answer
   x = 1,049,670.27