Finding the Third Proportional to 410,400 and 613,959.75

Step by Step Solution

1. Step 1: Write the proportion equation
   410,400 : 613,959.75 = 613,959.75 : x
2. Step 2: Convert to fraction form
   410,400/613,959.75 = 613,959.75/x
3. Step 3: Cross multiply
   410,400x = 613,959.75 × 613,959.75
4. Step 4: Simplify right side
   410,400x = 376,946,574,620.06
5. Step 5: Solve for x
   x = 376,946,574,620.06/410,400
6. Step 6: Final answer
   x = 918,485.81