Finding the Third Proportional to 90,317 and 139,301

Step by Step Solution

1. Step 1: Write the proportion equation
   90,317 : 139,301 = 139,301 : x
2. Step 2: Convert to fraction form
   90,317/139,301 = 139,301/x
3. Step 3: Cross multiply
   90,317x = 139,301 × 139,301
4. Step 4: Simplify right side
   90,317x = 19,404,768,601
5. Step 5: Solve for x
   x = 19,404,768,601/90,317
6. Step 6: Final answer
   x = 214,851.78