Finding the Third Proportional to 917,268 and 2,158,272

Step by Step Solution

1. Step 1: Write the proportion equation
   917,268 : 2,158,272 = 2,158,272 : x
2. Step 2: Convert to fraction form
   917,268/2,158,272 = 2,158,272/x
3. Step 3: Cross multiply
   917,268x = 2,158,272 × 2,158,272
4. Step 4: Simplify right side
   917,268x = 4,658,138,025,984
5. Step 5: Solve for x
   x = 4,658,138,025,984/917,268
6. Step 6: Final answer
   x = 5,078,273.77