Finding the Third Proportional to 387,825 and 808,860

Step by Step Solution

1. Step 1: Write the proportion equation
   387,825 : 808,860 = 808,860 : x
2. Step 2: Convert to fraction form
   387,825/808,860 = 808,860/x
3. Step 3: Cross multiply
   387,825x = 808,860 × 808,860
4. Step 4: Simplify right side
   387,825x = 654,254,499,600
5. Step 5: Solve for x
   x = 654,254,499,600/387,825
6. Step 6: Final answer
   x = 1,686,983.82