Finding the Fourth Proportional to 3,786.65, 5,680.94 and 1,321.52

Step by Step Solution

1. Step 1: Write the proportion equation
   3,786.65 : 5,680.94 = 1,321.52 : x
2. Step 2: Convert to fraction form
   3,786.65/5,680.94 = 1,321.52/x
3. Step 3: Cross multiply
   3,786.65x = 5,680.94 × 1,321.52
4. Step 4: Simplify right side
   3,786.65x = 7,507,440.82
5. Step 5: Solve for x
   x = 7,507,440.82/3,786.65
6. Step 6: Final answer
   x = 1,982.61