Finding the Fourth Proportional to 3,717.77, 5,129.61 and 2,145.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,717.77 : 5,129.61 = 2,145.86 : x
2. Step 2: Convert to fraction form
   3,717.77/5,129.61 = 2,145.86/x
3. Step 3: Cross multiply
   3,717.77x = 5,129.61 × 2,145.86
4. Step 4: Simplify right side
   3,717.77x = 11,007,399.27
5. Step 5: Solve for x
   x = 11,007,399.27/3,717.77
6. Step 6: Final answer
   x = 2,960.76