Finding the Third Proportional to 114,640.50 and 128,856

Step by Step Solution

1. Step 1: Write the proportion equation
   114,640.50 : 128,856 = 128,856 : x
2. Step 2: Convert to fraction form
   114,640.50/128,856 = 128,856/x
3. Step 3: Cross multiply
   114,640.50x = 128,856 × 128,856
4. Step 4: Simplify right side
   114,640.50x = 16,603,868,736
5. Step 5: Solve for x
   x = 16,603,868,736/114,640.50
6. Step 6: Final answer
   x = 144,834.23