Finding the Third Proportional to 212,464.50 and 456,505.50

Step by Step Solution

1. Step 1: Write the proportion equation
   212,464.50 : 456,505.50 = 456,505.50 : x
2. Step 2: Convert to fraction form
   212,464.50/456,505.50 = 456,505.50/x
3. Step 3: Cross multiply
   212,464.50x = 456,505.50 × 456,505.50
4. Step 4: Simplify right side
   212,464.50x = 208,397,271,530.25
5. Step 5: Solve for x
   x = 208,397,271,530.25/212,464.50
6. Step 6: Final answer
   x = 980,856.90