Finding the Third Proportional to 861,143 and 1,853,916

Step by Step Solution

1. Step 1: Write the proportion equation
   861,143 : 1,853,916 = 1,853,916 : x
2. Step 2: Convert to fraction form
   861,143/1,853,916 = 1,853,916/x
3. Step 3: Cross multiply
   861,143x = 1,853,916 × 1,853,916
4. Step 4: Simplify right side
   861,143x = 3,437,004,535,056
5. Step 5: Solve for x
   x = 3,437,004,535,056/861,143
6. Step 6: Final answer
   x = 3,991,212.30