Finding the Third Proportional to 864,642 and 1,381,284

Step by Step Solution

1. Step 1: Write the proportion equation
   864,642 : 1,381,284 = 1,381,284 : x
2. Step 2: Convert to fraction form
   864,642/1,381,284 = 1,381,284/x
3. Step 3: Cross multiply
   864,642x = 1,381,284 × 1,381,284
4. Step 4: Simplify right side
   864,642x = 1,907,945,488,656
5. Step 5: Solve for x
   x = 1,907,945,488,656/864,642
6. Step 6: Final answer
   x = 2,206,630.59