Finding the Third Proportional to 861,139 and 1,853,908

Step by Step Solution

1. Step 1: Write the proportion equation
   861,139 : 1,853,908 = 1,853,908 : x
2. Step 2: Convert to fraction form
   861,139/1,853,908 = 1,853,908/x
3. Step 3: Cross multiply
   861,139x = 1,853,908 × 1,853,908
4. Step 4: Simplify right side
   861,139x = 3,436,974,872,464
5. Step 5: Solve for x
   x = 3,436,974,872,464/861,139
6. Step 6: Final answer
   x = 3,991,196.40