Finding the Fourth Proportional to 3,980.91, 5,491.89 and 2,653.32

Step by Step Solution

1. Step 1: Write the proportion equation
   3,980.91 : 5,491.89 = 2,653.32 : x
2. Step 2: Convert to fraction form
   3,980.91/5,491.89 = 2,653.32/x
3. Step 3: Cross multiply
   3,980.91x = 5,491.89 × 2,653.32
4. Step 4: Simplify right side
   3,980.91x = 14,571,741.57
5. Step 5: Solve for x
   x = 14,571,741.57/3,980.91
6. Step 6: Final answer
   x = 3,660.40