Finding the Third Proportional to 308,258 and 483,690

Step by Step Solution

1. Step 1: Write the proportion equation
   308,258 : 483,690 = 483,690 : x
2. Step 2: Convert to fraction form
   308,258/483,690 = 483,690/x
3. Step 3: Cross multiply
   308,258x = 483,690 × 483,690
4. Step 4: Simplify right side
   308,258x = 233,956,016,100
5. Step 5: Solve for x
   x = 233,956,016,100/308,258
6. Step 6: Final answer
   x = 758,961.70