Finding the Third Proportional to 978,888 and 2,167,404

Step by Step Solution

1. Step 1: Write the proportion equation
   978,888 : 2,167,404 = 2,167,404 : x
2. Step 2: Convert to fraction form
   978,888/2,167,404 = 2,167,404/x
3. Step 3: Cross multiply
   978,888x = 2,167,404 × 2,167,404
4. Step 4: Simplify right side
   978,888x = 4,697,640,099,216
5. Step 5: Solve for x
   x = 4,697,640,099,216/978,888
6. Step 6: Final answer
   x = 4,798,955.65