Finding the Third Proportional to 858,271 and 1,261,131

Step by Step Solution

1. Step 1: Write the proportion equation
   858,271 : 1,261,131 = 1,261,131 : x
2. Step 2: Convert to fraction form
   858,271/1,261,131 = 1,261,131/x
3. Step 3: Cross multiply
   858,271x = 1,261,131 × 1,261,131
4. Step 4: Simplify right side
   858,271x = 1,590,451,399,161
5. Step 5: Solve for x
   x = 1,590,451,399,161/858,271
6. Step 6: Final answer
   x = 1,853,087.66