Finding the Third Proportional to 103,256 and 139,328

Step by Step Solution

1. Step 1: Write the proportion equation
   103,256 : 139,328 = 139,328 : x
2. Step 2: Convert to fraction form
   103,256/139,328 = 139,328/x
3. Step 3: Cross multiply
   103,256x = 139,328 × 139,328
4. Step 4: Simplify right side
   103,256x = 19,412,291,584
5. Step 5: Solve for x
   x = 19,412,291,584/103,256
6. Step 6: Final answer
   x = 188,001.58