Finding the Third Proportional to 860,680 and 1,891,216

Step by Step Solution

1. Step 1: Write the proportion equation
   860,680 : 1,891,216 = 1,891,216 : x
2. Step 2: Convert to fraction form
   860,680/1,891,216 = 1,891,216/x
3. Step 3: Cross multiply
   860,680x = 1,891,216 × 1,891,216
4. Step 4: Simplify right side
   860,680x = 3,576,697,958,656
5. Step 5: Solve for x
   x = 3,576,697,958,656/860,680
6. Step 6: Final answer
   x = 4,155,665.24