Finding the Fourth Proportional to 3,998.34, 5,518.42 and 2,507.54

Step by Step Solution

1. Step 1: Write the proportion equation
   3,998.34 : 5,518.42 = 2,507.54 : x
2. Step 2: Convert to fraction form
   3,998.34/5,518.42 = 2,507.54/x
3. Step 3: Cross multiply
   3,998.34x = 5,518.42 × 2,507.54
4. Step 4: Simplify right side
   3,998.34x = 13,837,658.89
5. Step 5: Solve for x
   x = 13,837,658.89/3,998.34
6. Step 6: Final answer
   x = 3,460.85