Finding the Third Proportional to 345,979.50 and 487,002

Step by Step Solution

1. Step 1: Write the proportion equation
   345,979.50 : 487,002 = 487,002 : x
2. Step 2: Convert to fraction form
   345,979.50/487,002 = 487,002/x
3. Step 3: Cross multiply
   345,979.50x = 487,002 × 487,002
4. Step 4: Simplify right side
   345,979.50x = 237,170,948,004
5. Step 5: Solve for x
   x = 237,170,948,004/345,979.50
6. Step 6: Final answer
   x = 685,505.78