Finding the Third Proportional to 98,578 and 139,483

Step by Step Solution

1. Step 1: Write the proportion equation
   98,578 : 139,483 = 139,483 : x
2. Step 2: Convert to fraction form
   98,578/139,483 = 139,483/x
3. Step 3: Cross multiply
   98,578x = 139,483 × 139,483
4. Step 4: Simplify right side
   98,578x = 19,455,507,289
5. Step 5: Solve for x
   x = 19,455,507,289/98,578
6. Step 6: Final answer
   x = 197,361.55