Finding the Third Proportional to 128,860.50 and 197,118

Step by Step Solution

1. Step 1: Write the proportion equation
   128,860.50 : 197,118 = 197,118 : x
2. Step 2: Convert to fraction form
   128,860.50/197,118 = 197,118/x
3. Step 3: Cross multiply
   128,860.50x = 197,118 × 197,118
4. Step 4: Simplify right side
   128,860.50x = 38,855,505,924
5. Step 5: Solve for x
   x = 38,855,505,924/128,860.50
6. Step 6: Final answer
   x = 301,531.55