Finding the Third Proportional to 917,508 and 2,158,704

Step by Step Solution

1. Step 1: Write the proportion equation
   917,508 : 2,158,704 = 2,158,704 : x
2. Step 2: Convert to fraction form
   917,508/2,158,704 = 2,158,704/x
3. Step 3: Cross multiply
   917,508x = 2,158,704 × 2,158,704
4. Step 4: Simplify right side
   917,508x = 4,660,002,959,616
5. Step 5: Solve for x
   x = 4,660,002,959,616/917,508
6. Step 6: Final answer
   x = 5,078,978.01