Finding the Third Proportional to 132,966 and 287,072

Step by Step Solution

1. Step 1: Write the proportion equation
   132,966 : 287,072 = 287,072 : x
2. Step 2: Convert to fraction form
   132,966/287,072 = 287,072/x
3. Step 3: Cross multiply
   132,966x = 287,072 × 287,072
4. Step 4: Simplify right side
   132,966x = 82,410,333,184
5. Step 5: Solve for x
   x = 82,410,333,184/132,966
6. Step 6: Final answer
   x = 619,785.01