Finding the Third Proportional to 857,817 and 1,856,865

Step by Step Solution

1. Step 1: Write the proportion equation
   857,817 : 1,856,865 = 1,856,865 : x
2. Step 2: Convert to fraction form
   857,817/1,856,865 = 1,856,865/x
3. Step 3: Cross multiply
   857,817x = 1,856,865 × 1,856,865
4. Step 4: Simplify right side
   857,817x = 3,447,947,628,225
5. Step 5: Solve for x
   x = 3,447,947,628,225/857,817
6. Step 6: Final answer
   x = 4,019,444.27