Finding the Fourth Proportional to 3,970.10, 5,479.30 and 2,291.52

Step by Step Solution

1. Step 1: Write the proportion equation
   3,970.10 : 5,479.30 = 2,291.52 : x
2. Step 2: Convert to fraction form
   3,970.10/5,479.30 = 2,291.52/x
3. Step 3: Cross multiply
   3,970.10x = 5,479.30 × 2,291.52
4. Step 4: Simplify right side
   3,970.10x = 12,555,925.54
5. Step 5: Solve for x
   x = 12,555,925.54/3,970.10
6. Step 6: Final answer
   x = 3,162.62