Finding the Third Proportional to 1,423,172 and 2,216,406

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423,172 : 2,216,406 = 2,216,406 : x
2. Step 2: Convert to fraction form
   1,423,172/2,216,406 = 2,216,406/x
3. Step 3: Cross multiply
   1,423,172x = 2,216,406 × 2,216,406
4. Step 4: Simplify right side
   1,423,172x = 4,912,455,556,836
5. Step 5: Solve for x
   x = 4,912,455,556,836/1,423,172
6. Step 6: Final answer
   x = 3,451,765.18