Finding the Third Proportional to 787,448 and 1,686,428

Step by Step Solution

1. Step 1: Write the proportion equation
   787,448 : 1,686,428 = 1,686,428 : x
2. Step 2: Convert to fraction form
   787,448/1,686,428 = 1,686,428/x
3. Step 3: Cross multiply
   787,448x = 1,686,428 × 1,686,428
4. Step 4: Simplify right side
   787,448x = 2,844,039,399,184
5. Step 5: Solve for x
   x = 2,844,039,399,184/787,448
6. Step 6: Final answer
   x = 3,611,717.09