Finding the Third Proportional to 559,618 and 1,221,680

Step by Step Solution

1. Step 1: Write the proportion equation
   559,618 : 1,221,680 = 1,221,680 : x
2. Step 2: Convert to fraction form
   559,618/1,221,680 = 1,221,680/x
3. Step 3: Cross multiply
   559,618x = 1,221,680 × 1,221,680
4. Step 4: Simplify right side
   559,618x = 1,492,502,022,400
5. Step 5: Solve for x
   x = 1,492,502,022,400/559,618
6. Step 6: Final answer
   x = 2,667,001.46