Finding the Fourth Proportional to 3,970.04, 5,478.59 and 2,201.61

Step by Step Solution

1. Step 1: Write the proportion equation
   3,970.04 : 5,478.59 = 2,201.61 : x
2. Step 2: Convert to fraction form
   3,970.04/5,478.59 = 2,201.61/x
3. Step 3: Cross multiply
   3,970.04x = 5,478.59 × 2,201.61
4. Step 4: Simplify right side
   3,970.04x = 12,061,707.52
5. Step 5: Solve for x
   x = 12,061,707.52/3,970.04
6. Step 6: Final answer
   x = 3,038.18