Finding the Third Proportional to 721,458 and 1,142,346

Step by Step Solution

1. Step 1: Write the proportion equation
   721,458 : 1,142,346 = 1,142,346 : x
2. Step 2: Convert to fraction form
   721,458/1,142,346 = 1,142,346/x
3. Step 3: Cross multiply
   721,458x = 1,142,346 × 1,142,346
4. Step 4: Simplify right side
   721,458x = 1,304,954,383,716
5. Step 5: Solve for x
   x = 1,304,954,383,716/721,458
6. Step 6: Final answer
   x = 1,808,773.88