Finding the Fourth Proportional to 3,410.72, 5,111.88 and 2,421.97

Step by Step Solution

1. Step 1: Write the proportion equation
   3,410.72 : 5,111.88 = 2,421.97 : x
2. Step 2: Convert to fraction form
   3,410.72/5,111.88 = 2,421.97/x
3. Step 3: Cross multiply
   3,410.72x = 5,111.88 × 2,421.97
4. Step 4: Simplify right side
   3,410.72x = 12,380,798.14
5. Step 5: Solve for x
   x = 12,380,798.14/3,410.72
6. Step 6: Final answer
   x = 3,629.97