Finding the Third Proportional to 609,621.50 and 905,601

Step by Step Solution

1. Step 1: Write the proportion equation
   609,621.50 : 905,601 = 905,601 : x
2. Step 2: Convert to fraction form
   609,621.50/905,601 = 905,601/x
3. Step 3: Cross multiply
   609,621.50x = 905,601 × 905,601
4. Step 4: Simplify right side
   609,621.50x = 820,113,171,201
5. Step 5: Solve for x
   x = 820,113,171,201/609,621.50
6. Step 6: Final answer
   x = 1,345,282.56