Finding the Third Proportional to 687,042 and 1,475,820

Step by Step Solution

1. Step 1: Write the proportion equation
   687,042 : 1,475,820 = 1,475,820 : x
2. Step 2: Convert to fraction form
   687,042/1,475,820 = 1,475,820/x
3. Step 3: Cross multiply
   687,042x = 1,475,820 × 1,475,820
4. Step 4: Simplify right side
   687,042x = 2,178,044,672,400
5. Step 5: Solve for x
   x = 2,178,044,672,400/687,042
6. Step 6: Final answer
   x = 3,170,176.89