Finding the Third Proportional to 200,421 and 300,895.50

Step by Step Solution

1. Step 1: Write the proportion equation
   200,421 : 300,895.50 = 300,895.50 : x
2. Step 2: Convert to fraction form
   200,421/300,895.50 = 300,895.50/x
3. Step 3: Cross multiply
   200,421x = 300,895.50 × 300,895.50
4. Step 4: Simplify right side
   200,421x = 90,538,101,920.25
5. Step 5: Solve for x
   x = 90,538,101,920.25/200,421
6. Step 6: Final answer
   x = 451,739.60