Finding the Fourth Proportional to 3,998.80, 5,518.86 and 2,404.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,998.80 : 5,518.86 = 2,404.72 : x
2. Step 2: Convert to fraction form
   3,998.80/5,518.86 = 2,404.72/x
3. Step 3: Cross multiply
   3,998.80x = 5,518.86 × 2,404.72
4. Step 4: Simplify right side
   3,998.80x = 13,271,313.02
5. Step 5: Solve for x
   x = 13,271,313.02/3,998.80
6. Step 6: Final answer
   x = 3,318.82