Finding the Third Proportional to 864,661 and 1,381,310

Step by Step Solution

1. Step 1: Write the proportion equation
   864,661 : 1,381,310 = 1,381,310 : x
2. Step 2: Convert to fraction form
   864,661/1,381,310 = 1,381,310/x
3. Step 3: Cross multiply
   864,661x = 1,381,310 × 1,381,310
4. Step 4: Simplify right side
   864,661x = 1,908,017,316,100
5. Step 5: Solve for x
   x = 1,908,017,316,100/864,661
6. Step 6: Final answer
   x = 2,206,665.17