Finding the Third Proportional to 711,186 and 1,678,820

Step by Step Solution

1. Step 1: Write the proportion equation
   711,186 : 1,678,820 = 1,678,820 : x
2. Step 2: Convert to fraction form
   711,186/1,678,820 = 1,678,820/x
3. Step 3: Cross multiply
   711,186x = 1,678,820 × 1,678,820
4. Step 4: Simplify right side
   711,186x = 2,818,436,592,400
5. Step 5: Solve for x
   x = 2,818,436,592,400/711,186
6. Step 6: Final answer
   x = 3,963,009.10