Finding the Fourth Proportional to 3,786.27, 5,679.45 and 1,321.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,786.27 : 5,679.45 = 1,321.10 : x
2. Step 2: Convert to fraction form
   3,786.27/5,679.45 = 1,321.10/x
3. Step 3: Cross multiply
   3,786.27x = 5,679.45 × 1,321.10
4. Step 4: Simplify right side
   3,786.27x = 7,503,093.00
5. Step 5: Solve for x
   x = 7,503,093.00/3,786.27
6. Step 6: Final answer
   x = 1,981.66