Finding the Third Proportional to 3,785,874 and 8,210,520

Step by Step Solution

1. Step 1: Write the proportion equation
   3,785,874 : 8,210,520 = 8,210,520 : x
2. Step 2: Convert to fraction form
   3,785,874/8,210,520 = 8,210,520/x
3. Step 3: Cross multiply
   3,785,874x = 8,210,520 × 8,210,520
4. Step 4: Simplify right side
   3,785,874x = 67,412,638,670,400
5. Step 5: Solve for x
   x = 67,412,638,670,400/3,785,874
6. Step 6: Final answer
   x = 17,806,360.87