Finding the Fourth Proportional to 3,857.16, 5,781.72 and 1,258.32

Step by Step Solution

1. Step 1: Write the proportion equation
   3,857.16 : 5,781.72 = 1,258.32 : x
2. Step 2: Convert to fraction form
   3,857.16/5,781.72 = 1,258.32/x
3. Step 3: Cross multiply
   3,857.16x = 5,781.72 × 1,258.32
4. Step 4: Simplify right side
   3,857.16x = 7,275,253.91
5. Step 5: Solve for x
   x = 7,275,253.91/3,857.16
6. Step 6: Final answer
   x = 1,886.17