Finding the Third Proportional to 637,487 and 1,387,128

Step by Step Solution

1. Step 1: Write the proportion equation
   637,487 : 1,387,128 = 1,387,128 : x
2. Step 2: Convert to fraction form
   637,487/1,387,128 = 1,387,128/x
3. Step 3: Cross multiply
   637,487x = 1,387,128 × 1,387,128
4. Step 4: Simplify right side
   637,487x = 1,924,124,088,384
5. Step 5: Solve for x
   x = 1,924,124,088,384/637,487
6. Step 6: Final answer
   x = 3,018,295.41