Finding the Third Proportional to 60,628.50 and 128,926.69

Step by Step Solution

1. Step 1: Write the proportion equation
   60,628.50 : 128,926.69 = 128,926.69 : x
2. Step 2: Convert to fraction form
   60,628.50/128,926.69 = 128,926.69/x
3. Step 3: Cross multiply
   60,628.50x = 128,926.69 × 128,926.69
4. Step 4: Simplify right side
   60,628.50x = 16,622,090,749.72
5. Step 5: Solve for x
   x = 16,622,090,749.72/60,628.50
6. Step 6: Final answer
   x = 274,162.99