Finding the Fourth Proportional to 3,389.40, 5,076.72 and 2,086.92

Step by Step Solution

1. Step 1: Write the proportion equation
   3,389.40 : 5,076.72 = 2,086.92 : x
2. Step 2: Convert to fraction form
   3,389.40/5,076.72 = 2,086.92/x
3. Step 3: Cross multiply
   3,389.40x = 5,076.72 × 2,086.92
4. Step 4: Simplify right side
   3,389.40x = 10,594,708.50
5. Step 5: Solve for x
   x = 10,594,708.50/3,389.40
6. Step 6: Final answer
   x = 3,125.84