Finding the Third Proportional to 641,980.69 and 1,518,213.38

Step by Step Solution

1. Step 1: Write the proportion equation
   641,980.69 : 1,518,213.38 = 1,518,213.38 : x
2. Step 2: Convert to fraction form
   641,980.69/1,518,213.38 = 1,518,213.38/x
3. Step 3: Cross multiply
   641,980.69x = 1,518,213.38 × 1,518,213.38
4. Step 4: Simplify right side
   641,980.69x = 2,304,971,852,028.89
5. Step 5: Solve for x
   x = 2,304,971,852,028.89/641,980.69
6. Step 6: Final answer
   x = 3,590,406.84