Finding the Third Proportional to 643,980 and 1,412,376

Step by Step Solution

1. Step 1: Write the proportion equation
   643,980 : 1,412,376 = 1,412,376 : x
2. Step 2: Convert to fraction form
   643,980/1,412,376 = 1,412,376/x
3. Step 3: Cross multiply
   643,980x = 1,412,376 × 1,412,376
4. Step 4: Simplify right side
   643,980x = 1,994,805,965,376
5. Step 5: Solve for x
   x = 1,994,805,965,376/643,980
6. Step 6: Final answer
   x = 3,097,620.99