Finding the Fourth Proportional to 3,970.47, 5,479.37 and 2,291.84

Step by Step Solution

1. Step 1: Write the proportion equation
   3,970.47 : 5,479.37 = 2,291.84 : x
2. Step 2: Convert to fraction form
   3,970.47/5,479.37 = 2,291.84/x
3. Step 3: Cross multiply
   3,970.47x = 5,479.37 × 2,291.84
4. Step 4: Simplify right side
   3,970.47x = 12,557,866.89
5. Step 5: Solve for x
   x = 12,557,866.89/3,970.47
6. Step 6: Final answer
   x = 3,162.82