Finding the Third Proportional to 132,849 and 287,405

Step by Step Solution

1. Step 1: Write the proportion equation
   132,849 : 287,405 = 287,405 : x
2. Step 2: Convert to fraction form
   132,849/287,405 = 287,405/x
3. Step 3: Cross multiply
   132,849x = 287,405 × 287,405
4. Step 4: Simplify right side
   132,849x = 82,601,634,025
5. Step 5: Solve for x
   x = 82,601,634,025/132,849
6. Step 6: Final answer
   x = 621,770.84