Finding the Fourth Proportional to 3,964.60, 5,470.59 and 2,196.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,964.60 : 5,470.59 = 2,196.31 : x
2. Step 2: Convert to fraction form
   3,964.60/5,470.59 = 2,196.31/x
3. Step 3: Cross multiply
   3,964.60x = 5,470.59 × 2,196.31
4. Step 4: Simplify right side
   3,964.60x = 12,015,111.52
5. Step 5: Solve for x
   x = 12,015,111.52/3,964.60
6. Step 6: Final answer
   x = 3,030.60