Finding the Third Proportional to 128,741.63 and 188,503.69

Step by Step Solution

1. Step 1: Write the proportion equation
   128,741.63 : 188,503.69 = 188,503.69 : x
2. Step 2: Convert to fraction form
   128,741.63/188,503.69 = 188,503.69/x
3. Step 3: Cross multiply
   128,741.63x = 188,503.69 × 188,503.69
4. Step 4: Simplify right side
   128,741.63x = 35,533,640,201.10
5. Step 5: Solve for x
   x = 35,533,640,201.10/128,741.63
6. Step 6: Final answer
   x = 276,007.39