Finding the Third Proportional to 123,210 and 287,937

Step by Step Solution

1. Step 1: Write the proportion equation
   123,210 : 287,937 = 287,937 : x
2. Step 2: Convert to fraction form
   123,210/287,937 = 287,937/x
3. Step 3: Cross multiply
   123,210x = 287,937 × 287,937
4. Step 4: Simplify right side
   123,210x = 82,907,715,969
5. Step 5: Solve for x
   x = 82,907,715,969/123,210
6. Step 6: Final answer
   x = 672,897.62