Finding the Third Proportional to 868,216 and 1,861,028

Step by Step Solution

1. Step 1: Write the proportion equation
   868,216 : 1,861,028 = 1,861,028 : x
2. Step 2: Convert to fraction form
   868,216/1,861,028 = 1,861,028/x
3. Step 3: Cross multiply
   868,216x = 1,861,028 × 1,861,028
4. Step 4: Simplify right side
   868,216x = 3,463,425,216,784
5. Step 5: Solve for x
   x = 3,463,425,216,784/868,216
6. Step 6: Final answer
   x = 3,989,128.53