Finding the Third Proportional to 131,842 and 289,892

Step by Step Solution

1. Step 1: Write the proportion equation
   131,842 : 289,892 = 289,892 : x
2. Step 2: Convert to fraction form
   131,842/289,892 = 289,892/x
3. Step 3: Cross multiply
   131,842x = 289,892 × 289,892
4. Step 4: Simplify right side
   131,842x = 84,037,371,664
5. Step 5: Solve for x
   x = 84,037,371,664/131,842
6. Step 6: Final answer
   x = 637,409.72