Finding the Fourth Proportional to 3,892.79, 5,836.94 and 2,661.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,892.79 : 5,836.94 = 2,661.69 : x
2. Step 2: Convert to fraction form
   3,892.79/5,836.94 = 2,661.69/x
3. Step 3: Cross multiply
   3,892.79x = 5,836.94 × 2,661.69
4. Step 4: Simplify right side
   3,892.79x = 15,536,124.83
5. Step 5: Solve for x
   x = 15,536,124.83/3,892.79
6. Step 6: Final answer
   x = 3,991.00