Finding the Third Proportional to 415,219.50 and 620,667

Step by Step Solution

1. Step 1: Write the proportion equation
   415,219.50 : 620,667 = 620,667 : x
2. Step 2: Convert to fraction form
   415,219.50/620,667 = 620,667/x
3. Step 3: Cross multiply
   415,219.50x = 620,667 × 620,667
4. Step 4: Simplify right side
   415,219.50x = 385,227,524,889
5. Step 5: Solve for x
   x = 385,227,524,889/415,219.50
6. Step 6: Final answer
   x = 927,768.38