Finding the Fourth Proportional to 3,853.31, 5,780.88 and 1,256.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,853.31 : 5,780.88 = 1,256.25 : x
2. Step 2: Convert to fraction form
   3,853.31/5,780.88 = 1,256.25/x
3. Step 3: Cross multiply
   3,853.31x = 5,780.88 × 1,256.25
4. Step 4: Simplify right side
   3,853.31x = 7,262,230.50
5. Step 5: Solve for x
   x = 7,262,230.50/3,853.31
6. Step 6: Final answer
   x = 1,884.67