Finding the Third Proportional to 864,311 and 1,867,105

Step by Step Solution

1. Step 1: Write the proportion equation
   864,311 : 1,867,105 = 1,867,105 : x
2. Step 2: Convert to fraction form
   864,311/1,867,105 = 1,867,105/x
3. Step 3: Cross multiply
   864,311x = 1,867,105 × 1,867,105
4. Step 4: Simplify right side
   864,311x = 3,486,081,081,025
5. Step 5: Solve for x
   x = 3,486,081,081,025/864,311
6. Step 6: Final answer
   x = 4,033,364.24