Finding the Third Proportional to 400,380 and 879,510

Step by Step Solution

1. Step 1: Write the proportion equation
   400,380 : 879,510 = 879,510 : x
2. Step 2: Convert to fraction form
   400,380/879,510 = 879,510/x
3. Step 3: Cross multiply
   400,380x = 879,510 × 879,510
4. Step 4: Simplify right side
   400,380x = 773,537,840,100
5. Step 5: Solve for x
   x = 773,537,840,100/400,380
6. Step 6: Final answer
   x = 1,932,009.19