Finding the Third Proportional to 3,100.78 and 7,171.03

Step by Step Solution

1. Step 1: Write the proportion equation
   3,100.78 : 7,171.03 = 7,171.03 : x
2. Step 2: Convert to fraction form
   3,100.78/7,171.03 = 7,171.03/x
3. Step 3: Cross multiply
   3,100.78x = 7,171.03 × 7,171.03
4. Step 4: Simplify right side
   3,100.78x = 51,423,689.19
5. Step 5: Solve for x
   x = 51,423,689.19/3,100.78
6. Step 6: Final answer
   x = 16,584.11