Finding the Fourth Proportional to 3,990.98, 5,498.37 and 3,151.37

Step by Step Solution

1. Step 1: Write the proportion equation
   3,990.98 : 5,498.37 = 3,151.37 : x
2. Step 2: Convert to fraction form
   3,990.98/5,498.37 = 3,151.37/x
3. Step 3: Cross multiply
   3,990.98x = 5,498.37 × 3,151.37
4. Step 4: Simplify right side
   3,990.98x = 17,327,412.01
5. Step 5: Solve for x
   x = 17,327,412.01/3,990.98
6. Step 6: Final answer
   x = 4,341.65