Finding the Third Proportional to 60,109.50 and 128,262

Step by Step Solution

1. Step 1: Write the proportion equation
   60,109.50 : 128,262 = 128,262 : x
2. Step 2: Convert to fraction form
   60,109.50/128,262 = 128,262/x
3. Step 3: Cross multiply
   60,109.50x = 128,262 × 128,262
4. Step 4: Simplify right side
   60,109.50x = 16,451,140,644
5. Step 5: Solve for x
   x = 16,451,140,644/60,109.50
6. Step 6: Final answer
   x = 273,686.20