Finding the Fourth Proportional to 3,809.30, 5,705.69 and 1,857.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,809.30 : 5,705.69 = 1,857.38 : x
2. Step 2: Convert to fraction form
   3,809.30/5,705.69 = 1,857.38/x
3. Step 3: Cross multiply
   3,809.30x = 5,705.69 × 1,857.38
4. Step 4: Simplify right side
   3,809.30x = 10,597,596.68
5. Step 5: Solve for x
   x = 10,597,596.68/3,809.30
6. Step 6: Final answer
   x = 2,782.04