Finding the Third Proportional to 60,310.50 and 128,916

Step by Step Solution

1. Step 1: Write the proportion equation
   60,310.50 : 128,916 = 128,916 : x
2. Step 2: Convert to fraction form
   60,310.50/128,916 = 128,916/x
3. Step 3: Cross multiply
   60,310.50x = 128,916 × 128,916
4. Step 4: Simplify right side
   60,310.50x = 16,619,335,056
5. Step 5: Solve for x
   x = 16,619,335,056/60,310.50
6. Step 6: Final answer
   x = 275,562.88