Finding the Third Proportional to 60,316 and 128,648

Step by Step Solution

1. Step 1: Write the proportion equation
   60,316 : 128,648 = 128,648 : x
2. Step 2: Convert to fraction form
   60,316/128,648 = 128,648/x
3. Step 3: Cross multiply
   60,316x = 128,648 × 128,648
4. Step 4: Simplify right side
   60,316x = 16,550,307,904
5. Step 5: Solve for x
   x = 16,550,307,904/60,316
6. Step 6: Final answer
   x = 274,393.33