Finding the Third Proportional to 637,786 and 987,488

Step by Step Solution

1. Step 1: Write the proportion equation
   637,786 : 987,488 = 987,488 : x
2. Step 2: Convert to fraction form
   637,786/987,488 = 987,488/x
3. Step 3: Cross multiply
   637,786x = 987,488 × 987,488
4. Step 4: Simplify right side
   637,786x = 975,132,550,144
5. Step 5: Solve for x
   x = 975,132,550,144/637,786
6. Step 6: Final answer
   x = 1,528,933.76