Finding the Fourth Proportional to 3,970.06, 5,478.56 and 2,201.62

Step by Step Solution

1. Step 1: Write the proportion equation
   3,970.06 : 5,478.56 = 2,201.62 : x
2. Step 2: Convert to fraction form
   3,970.06/5,478.56 = 2,201.62/x
3. Step 3: Cross multiply
   3,970.06x = 5,478.56 × 2,201.62
4. Step 4: Simplify right side
   3,970.06x = 12,061,707.27
5. Step 5: Solve for x
   x = 12,061,707.27/3,970.06
6. Step 6: Final answer
   x = 3,038.17