Finding the Fourth Proportional to 3,707.69, 5,116.61 and 2,135.79

Step by Step Solution

1. Step 1: Write the proportion equation
   3,707.69 : 5,116.61 = 2,135.79 : x
2. Step 2: Convert to fraction form
   3,707.69/5,116.61 = 2,135.79/x
3. Step 3: Cross multiply
   3,707.69x = 5,116.61 × 2,135.79
4. Step 4: Simplify right side
   3,707.69x = 10,928,004.47
5. Step 5: Solve for x
   x = 10,928,004.47/3,707.69
6. Step 6: Final answer
   x = 2,947.39