Finding the Third Proportional to 978,642 and 1,430,199

Step by Step Solution

1. Step 1: Write the proportion equation
   978,642 : 1,430,199 = 1,430,199 : x
2. Step 2: Convert to fraction form
   978,642/1,430,199 = 1,430,199/x
3. Step 3: Cross multiply
   978,642x = 1,430,199 × 1,430,199
4. Step 4: Simplify right side
   978,642x = 2,045,469,179,601
5. Step 5: Solve for x
   x = 2,045,469,179,601/978,642
6. Step 6: Final answer
   x = 2,090,109.74