Finding the Third Proportional to 268,218 and 558,258.75

Step by Step Solution

1. Step 1: Write the proportion equation
   268,218 : 558,258.75 = 558,258.75 : x
2. Step 2: Convert to fraction form
   268,218/558,258.75 = 558,258.75/x
3. Step 3: Cross multiply
   268,218x = 558,258.75 × 558,258.75
4. Step 4: Simplify right side
   268,218x = 311,652,831,951.56
5. Step 5: Solve for x
   x = 311,652,831,951.56/268,218
6. Step 6: Final answer
   x = 1,161,938.54