Finding the Third Proportional to 242,699 and 379,892

Step by Step Solution

1. Step 1: Write the proportion equation
   242,699 : 379,892 = 379,892 : x
2. Step 2: Convert to fraction form
   242,699/379,892 = 379,892/x
3. Step 3: Cross multiply
   242,699x = 379,892 × 379,892
4. Step 4: Simplify right side
   242,699x = 144,317,931,664
5. Step 5: Solve for x
   x = 144,317,931,664/242,699
6. Step 6: Final answer
   x = 594,637.52