Finding the Third Proportional to 404,082 and 618,421.50

Step by Step Solution

1. Step 1: Write the proportion equation
   404,082 : 618,421.50 = 618,421.50 : x
2. Step 2: Convert to fraction form
   404,082/618,421.50 = 618,421.50/x
3. Step 3: Cross multiply
   404,082x = 618,421.50 × 618,421.50
4. Step 4: Simplify right side
   404,082x = 382,445,151,662.25
5. Step 5: Solve for x
   x = 382,445,151,662.25/404,082
6. Step 6: Final answer
   x = 946,454.31