Finding the Third Proportional to 70,978 and 118,289

Step by Step Solution

1. Step 1: Write the proportion equation
   70,978 : 118,289 = 118,289 : x
2. Step 2: Convert to fraction form
   70,978/118,289 = 118,289/x
3. Step 3: Cross multiply
   70,978x = 118,289 × 118,289
4. Step 4: Simplify right side
   70,978x = 13,992,287,521
5. Step 5: Solve for x
   x = 13,992,287,521/70,978
6. Step 6: Final answer
   x = 197,135.56