Finding the Third Proportional to 917,281 and 2,158,306

Step by Step Solution

1. Step 1: Write the proportion equation
   917,281 : 2,158,306 = 2,158,306 : x
2. Step 2: Convert to fraction form
   917,281/2,158,306 = 2,158,306/x
3. Step 3: Cross multiply
   917,281x = 2,158,306 × 2,158,306
4. Step 4: Simplify right side
   917,281x = 4,658,284,789,636
5. Step 5: Solve for x
   x = 4,658,284,789,636/917,281
6. Step 6: Final answer
   x = 5,078,361.80