Finding the Third Proportional to 404,412.75 and 618,890.63

Step by Step Solution

1. Step 1: Write the proportion equation
   404,412.75 : 618,890.63 = 618,890.63 : x
2. Step 2: Convert to fraction form
   404,412.75/618,890.63 = 618,890.63/x
3. Step 3: Cross multiply
   404,412.75x = 618,890.63 × 618,890.63
4. Step 4: Simplify right side
   404,412.75x = 383,025,605,712.89
5. Step 5: Solve for x
   x = 383,025,605,712.89/404,412.75
6. Step 6: Final answer
   x = 947,115.55