Finding the Fourth Proportional to 3,856.47, 5,785.65 and 1,259.34

Step by Step Solution

1. Step 1: Write the proportion equation
   3,856.47 : 5,785.65 = 1,259.34 : x
2. Step 2: Convert to fraction form
   3,856.47/5,785.65 = 1,259.34/x
3. Step 3: Cross multiply
   3,856.47x = 5,785.65 × 1,259.34
4. Step 4: Simplify right side
   3,856.47x = 7,286,100.47
5. Step 5: Solve for x
   x = 7,286,100.47/3,856.47
6. Step 6: Final answer
   x = 1,889.32