Finding the Fourth Proportional to 3,970.56, 5,480.15 and 2,291.93

Step by Step Solution

1. Step 1: Write the proportion equation
   3,970.56 : 5,480.15 = 2,291.93 : x
2. Step 2: Convert to fraction form
   3,970.56/5,480.15 = 2,291.93/x
3. Step 3: Cross multiply
   3,970.56x = 5,480.15 × 2,291.93
4. Step 4: Simplify right side
   3,970.56x = 12,560,081.33
5. Step 5: Solve for x
   x = 12,560,081.33/3,970.56
6. Step 6: Final answer
   x = 3,163.30