Finding the Third Proportional to 542,488 and 1,188,318

Step by Step Solution

1. Step 1: Write the proportion equation
   542,488 : 1,188,318 = 1,188,318 : x
2. Step 2: Convert to fraction form
   542,488/1,188,318 = 1,188,318/x
3. Step 3: Cross multiply
   542,488x = 1,188,318 × 1,188,318
4. Step 4: Simplify right side
   542,488x = 1,412,099,669,124
5. Step 5: Solve for x
   x = 1,412,099,669,124/542,488
6. Step 6: Final answer
   x = 2,603,006.28