Finding the Third Proportional to 213,411 and 457,249.50

Step by Step Solution

1. Step 1: Write the proportion equation
   213,411 : 457,249.50 = 457,249.50 : x
2. Step 2: Convert to fraction form
   213,411/457,249.50 = 457,249.50/x
3. Step 3: Cross multiply
   213,411x = 457,249.50 × 457,249.50
4. Step 4: Simplify right side
   213,411x = 209,077,105,250.25
5. Step 5: Solve for x
   x = 209,077,105,250.25/213,411
6. Step 6: Final answer
   x = 979,692.26