Finding the Third Proportional to 657,678 and 1,415,172

Step by Step Solution

1. Step 1: Write the proportion equation
   657,678 : 1,415,172 = 1,415,172 : x
2. Step 2: Convert to fraction form
   657,678/1,415,172 = 1,415,172/x
3. Step 3: Cross multiply
   657,678x = 1,415,172 × 1,415,172
4. Step 4: Simplify right side
   657,678x = 2,002,711,789,584
5. Step 5: Solve for x
   x = 2,002,711,789,584/657,678
6. Step 6: Final answer
   x = 3,045,125.11