Finding the Third Proportional to 60,099.47 and 128,536.88

Step by Step Solution

1. Step 1: Write the proportion equation
   60,099.47 : 128,536.88 = 128,536.88 : x
2. Step 2: Convert to fraction form
   60,099.47/128,536.88 = 128,536.88/x
3. Step 3: Cross multiply
   60,099.47x = 128,536.88 × 128,536.88
4. Step 4: Simplify right side
   60,099.47x = 16,521,728,234.77
5. Step 5: Solve for x
   x = 16,521,728,234.77/60,099.47
6. Step 6: Final answer
   x = 274,906.39