Finding the Third Proportional to 242,978 and 525,892

Step by Step Solution

1. Step 1: Write the proportion equation
   242,978 : 525,892 = 525,892 : x
2. Step 2: Convert to fraction form
   242,978/525,892 = 525,892/x
3. Step 3: Cross multiply
   242,978x = 525,892 × 525,892
4. Step 4: Simplify right side
   242,978x = 276,562,395,664
5. Step 5: Solve for x
   x = 276,562,395,664/242,978
6. Step 6: Final answer
   x = 1,138,219.90