Finding the Third Proportional to 61,401 and 128,998.50

Step by Step Solution

1. Step 1: Write the proportion equation
   61,401 : 128,998.50 = 128,998.50 : x
2. Step 2: Convert to fraction form
   61,401/128,998.50 = 128,998.50/x
3. Step 3: Cross multiply
   61,401x = 128,998.50 × 128,998.50
4. Step 4: Simplify right side
   61,401x = 16,640,613,002.25
5. Step 5: Solve for x
   x = 16,640,613,002.25/61,401
6. Step 6: Final answer
   x = 271,015.34