Finding the Third Proportional to 857,762 and 1,261,688

Step by Step Solution

1. Step 1: Write the proportion equation
   857,762 : 1,261,688 = 1,261,688 : x
2. Step 2: Convert to fraction form
   857,762/1,261,688 = 1,261,688/x
3. Step 3: Cross multiply
   857,762x = 1,261,688 × 1,261,688
4. Step 4: Simplify right side
   857,762x = 1,591,856,609,344
5. Step 5: Solve for x
   x = 1,591,856,609,344/857,762
6. Step 6: Final answer
   x = 1,855,825.52