Finding the Third Proportional to 648,858 and 1,397,558

Step by Step Solution

1. Step 1: Write the proportion equation
   648,858 : 1,397,558 = 1,397,558 : x
2. Step 2: Convert to fraction form
   648,858/1,397,558 = 1,397,558/x
3. Step 3: Cross multiply
   648,858x = 1,397,558 × 1,397,558
4. Step 4: Simplify right side
   648,858x = 1,953,168,363,364
5. Step 5: Solve for x
   x = 1,953,168,363,364/648,858
6. Step 6: Final answer
   x = 3,010,163.03