Finding the Third Proportional to 856,871 and 1,878,757

Step by Step Solution

1. Step 1: Write the proportion equation
   856,871 : 1,878,757 = 1,878,757 : x
2. Step 2: Convert to fraction form
   856,871/1,878,757 = 1,878,757/x
3. Step 3: Cross multiply
   856,871x = 1,878,757 × 1,878,757
4. Step 4: Simplify right side
   856,871x = 3,529,727,865,049
5. Step 5: Solve for x
   x = 3,529,727,865,049/856,871
6. Step 6: Final answer
   x = 4,119,322.35