Finding the Third Proportional to 213,401.25 and 457,231.50

Step by Step Solution

1. Step 1: Write the proportion equation
   213,401.25 : 457,231.50 = 457,231.50 : x
2. Step 2: Convert to fraction form
   213,401.25/457,231.50 = 457,231.50/x
3. Step 3: Cross multiply
   213,401.25x = 457,231.50 × 457,231.50
4. Step 4: Simplify right side
   213,401.25x = 209,060,644,592.25
5. Step 5: Solve for x
   x = 209,060,644,592.25/213,401.25
6. Step 6: Final answer
   x = 979,659.89