Finding the Fourth Proportional to 3,980.98, 5,495.72 and 2,489.74

Step by Step Solution

1. Step 1: Write the proportion equation
   3,980.98 : 5,495.72 = 2,489.74 : x
2. Step 2: Convert to fraction form
   3,980.98/5,495.72 = 2,489.74/x
3. Step 3: Cross multiply
   3,980.98x = 5,495.72 × 2,489.74
4. Step 4: Simplify right side
   3,980.98x = 13,682,887.72
5. Step 5: Solve for x
   x = 13,682,887.72/3,980.98
6. Step 6: Final answer
   x = 3,437.06