Finding the Third Proportional to 1,209,618 and 1,991,763

Step by Step Solution

1. Step 1: Write the proportion equation
   1,209,618 : 1,991,763 = 1,991,763 : x
2. Step 2: Convert to fraction form
   1,209,618/1,991,763 = 1,991,763/x
3. Step 3: Cross multiply
   1,209,618x = 1,991,763 × 1,991,763
4. Step 4: Simplify right side
   1,209,618x = 3,967,119,848,169
5. Step 5: Solve for x
   x = 3,967,119,848,169/1,209,618
6. Step 6: Final answer
   x = 3,279,646.84