Finding the Fourth Proportional to 3,970.56, 5,479.32 and 2,202.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,970.56 : 5,479.32 = 2,202.15 : x
2. Step 2: Convert to fraction form
   3,970.56/5,479.32 = 2,202.15/x
3. Step 3: Cross multiply
   3,970.56x = 5,479.32 × 2,202.15
4. Step 4: Simplify right side
   3,970.56x = 12,066,284.54
5. Step 5: Solve for x
   x = 12,066,284.54/3,970.56
6. Step 6: Final answer
   x = 3,038.94