Finding the Third Proportional to 210,258 and 302,236.50

Step by Step Solution

1. Step 1: Write the proportion equation
   210,258 : 302,236.50 = 302,236.50 : x
2. Step 2: Convert to fraction form
   210,258/302,236.50 = 302,236.50/x
3. Step 3: Cross multiply
   210,258x = 302,236.50 × 302,236.50
4. Step 4: Simplify right side
   210,258x = 91,346,901,932.25
5. Step 5: Solve for x
   x = 91,346,901,932.25/210,258
6. Step 6: Final answer
   x = 434,451.49