Finding the Third Proportional to 641,985 and 1,518,222

Step by Step Solution

1. Step 1: Write the proportion equation
   641,985 : 1,518,222 = 1,518,222 : x
2. Step 2: Convert to fraction form
   641,985/1,518,222 = 1,518,222/x
3. Step 3: Cross multiply
   641,985x = 1,518,222 × 1,518,222
4. Step 4: Simplify right side
   641,985x = 2,304,998,041,284
5. Step 5: Solve for x
   x = 2,304,998,041,284/641,985
6. Step 6: Final answer
   x = 3,590,423.52