Finding the Third Proportional to 237,024 and 391,488

Step by Step Solution

1. Step 1: Write the proportion equation
   237,024 : 391,488 = 391,488 : x
2. Step 2: Convert to fraction form
   237,024/391,488 = 391,488/x
3. Step 3: Cross multiply
   237,024x = 391,488 × 391,488
4. Step 4: Simplify right side
   237,024x = 153,262,854,144
5. Step 5: Solve for x
   x = 153,262,854,144/237,024
6. Step 6: Final answer
   x = 646,613.23