Finding the Third Proportional to 3,187.69 and 7,042.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,187.69 : 7,042.78 = 7,042.78 : x
2. Step 2: Convert to fraction form
   3,187.69/7,042.78 = 7,042.78/x
3. Step 3: Cross multiply
   3,187.69x = 7,042.78 × 7,042.78
4. Step 4: Simplify right side
   3,187.69x = 49,600,767.74
5. Step 5: Solve for x
   x = 49,600,767.74/3,187.69
6. Step 6: Final answer
   x = 15,560.11