Finding the Third Proportional to 300,820.50 and 451,294.88

Step by Step Solution

1. Step 1: Write the proportion equation
   300,820.50 : 451,294.88 = 451,294.88 : x
2. Step 2: Convert to fraction form
   300,820.50/451,294.88 = 451,294.88/x
3. Step 3: Cross multiply
   300,820.50x = 451,294.88 × 451,294.88
4. Step 4: Simplify right side
   300,820.50x = 203,667,064,201.27
5. Step 5: Solve for x
   x = 203,667,064,201.27/300,820.50
6. Step 6: Final answer
   x = 677,038.51