Finding the Third Proportional to 857,720 and 1,261,632

Step by Step Solution

1. Step 1: Write the proportion equation
   857,720 : 1,261,632 = 1,261,632 : x
2. Step 2: Convert to fraction form
   857,720/1,261,632 = 1,261,632/x
3. Step 3: Cross multiply
   857,720x = 1,261,632 × 1,261,632
4. Step 4: Simplify right side
   857,720x = 1,591,715,303,424
5. Step 5: Solve for x
   x = 1,591,715,303,424/857,720
6. Step 6: Final answer
   x = 1,855,751.65