Finding the Third Proportional to 3,790,478 and 8,210,812

Step by Step Solution

1. Step 1: Write the proportion equation
   3,790,478 : 8,210,812 = 8,210,812 : x
2. Step 2: Convert to fraction form
   3,790,478/8,210,812 = 8,210,812/x
3. Step 3: Cross multiply
   3,790,478x = 8,210,812 × 8,210,812
4. Step 4: Simplify right side
   3,790,478x = 67,417,433,699,344
5. Step 5: Solve for x
   x = 67,417,433,699,344/3,790,478
6. Step 6: Final answer
   x = 17,785,997.89