Finding the Third Proportional to 857,743 and 1,261,666.50

Step by Step Solution

1. Step 1: Write the proportion equation
   857,743 : 1,261,666.50 = 1,261,666.50 : x
2. Step 2: Convert to fraction form
   857,743/1,261,666.50 = 1,261,666.50/x
3. Step 3: Cross multiply
   857,743x = 1,261,666.50 × 1,261,666.50
4. Step 4: Simplify right side
   857,743x = 1,591,802,357,222.25
5. Step 5: Solve for x
   x = 1,591,802,357,222.25/857,743
6. Step 6: Final answer
   x = 1,855,803.38