Finding the Fourth Proportional to 3,980.47, 5,491.47 and 2,301.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,980.47 : 5,491.47 = 2,301.56 : x
2. Step 2: Convert to fraction form
   3,980.47/5,491.47 = 2,301.56/x
3. Step 3: Cross multiply
   3,980.47x = 5,491.47 × 2,301.56
4. Step 4: Simplify right side
   3,980.47x = 12,638,947.69
5. Step 5: Solve for x
   x = 12,638,947.69/3,980.47
6. Step 6: Final answer
   x = 3,175.24