Finding the Third Proportional to 1,418,308 and 2,128,458

Step by Step Solution

1. Step 1: Write the proportion equation
   1,418,308 : 2,128,458 = 2,128,458 : x
2. Step 2: Convert to fraction form
   1,418,308/2,128,458 = 2,128,458/x
3. Step 3: Cross multiply
   1,418,308x = 2,128,458 × 2,128,458
4. Step 4: Simplify right side
   1,418,308x = 4,530,333,457,764
5. Step 5: Solve for x
   x = 4,530,333,457,764/1,418,308
6. Step 6: Final answer
   x = 3,194,181.70