Finding the Third Proportional to 1,912,338 and 4,172,409

Step by Step Solution

1. Step 1: Write the proportion equation
   1,912,338 : 4,172,409 = 4,172,409 : x
2. Step 2: Convert to fraction form
   1,912,338/4,172,409 = 4,172,409/x
3. Step 3: Cross multiply
   1,912,338x = 4,172,409 × 4,172,409
4. Step 4: Simplify right side
   1,912,338x = 17,408,996,863,281
5. Step 5: Solve for x
   x = 17,408,996,863,281/1,912,338
6. Step 6: Final answer
   x = 9,103,514.58