Finding the Third Proportional to 1,511,903 and 2,178,430

Step by Step Solution

1. Step 1: Write the proportion equation
   1,511,903 : 2,178,430 = 2,178,430 : x
2. Step 2: Convert to fraction form
   1,511,903/2,178,430 = 2,178,430/x
3. Step 3: Cross multiply
   1,511,903x = 2,178,430 × 2,178,430
4. Step 4: Simplify right side
   1,511,903x = 4,745,557,264,900
5. Step 5: Solve for x
   x = 4,745,557,264,900/1,511,903
6. Step 6: Final answer
   x = 3,138,797.44