Finding the Third Proportional to 428,775 and 846,705.75

Step by Step Solution

1. Step 1: Write the proportion equation
   428,775 : 846,705.75 = 846,705.75 : x
2. Step 2: Convert to fraction form
   428,775/846,705.75 = 846,705.75/x
3. Step 3: Cross multiply
   428,775x = 846,705.75 × 846,705.75
4. Step 4: Simplify right side
   428,775x = 716,910,627,083.06
5. Step 5: Solve for x
   x = 716,910,627,083.06/428,775
6. Step 6: Final answer
   x = 1,671,997.26