Finding the Third Proportional to 645,792 and 886,499

Step by Step Solution

1. Step 1: Write the proportion equation
   645,792 : 886,499 = 886,499 : x
2. Step 2: Convert to fraction form
   645,792/886,499 = 886,499/x
3. Step 3: Cross multiply
   645,792x = 886,499 × 886,499
4. Step 4: Simplify right side
   645,792x = 785,880,477,001
5. Step 5: Solve for x
   x = 785,880,477,001/645,792
6. Step 6: Final answer
   x = 1,216,925.07