Finding the Fourth Proportional to 3,974.72, 5,485.11 and 2,402.81

Step by Step Solution

1. Step 1: Write the proportion equation
   3,974.72 : 5,485.11 = 2,402.81 : x
2. Step 2: Convert to fraction form
   3,974.72/5,485.11 = 2,402.81/x
3. Step 3: Cross multiply
   3,974.72x = 5,485.11 × 2,402.81
4. Step 4: Simplify right side
   3,974.72x = 13,179,699.88
5. Step 5: Solve for x
   x = 13,179,699.88/3,974.72
6. Step 6: Final answer
   x = 3,315.88