Finding the Third Proportional to 3,128.63 and 3,675.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,128.63 : 3,675.38 = 3,675.38 : x
2. Step 2: Convert to fraction form
   3,128.63/3,675.38 = 3,675.38/x
3. Step 3: Cross multiply
   3,128.63x = 3,675.38 × 3,675.38
4. Step 4: Simplify right side
   3,128.63x = 13,508,381.39
5. Step 5: Solve for x
   x = 13,508,381.39/3,128.63
6. Step 6: Final answer
   x = 4,317.67