Finding the Fourth Proportional to 3,786.40, 5,680.72 and 1,707.04

Step by Step Solution

1. Step 1: Write the proportion equation
   3,786.40 : 5,680.72 = 1,707.04 : x
2. Step 2: Convert to fraction form
   3,786.40/5,680.72 = 1,707.04/x
3. Step 3: Cross multiply
   3,786.40x = 5,680.72 × 1,707.04
4. Step 4: Simplify right side
   3,786.40x = 9,697,187.87
5. Step 5: Solve for x
   x = 9,697,187.87/3,786.40
6. Step 6: Final answer
   x = 2,561.06