Finding the Fourth Proportional to 3,989.89, 5,507.76 and 2,497.49

Step by Step Solution

1. Step 1: Write the proportion equation
   3,989.89 : 5,507.76 = 2,497.49 : x
2. Step 2: Convert to fraction form
   3,989.89/5,507.76 = 2,497.49/x
3. Step 3: Cross multiply
   3,989.89x = 5,507.76 × 2,497.49
4. Step 4: Simplify right side
   3,989.89x = 13,755,575.52
5. Step 5: Solve for x
   x = 13,755,575.52/3,989.89
6. Step 6: Final answer
   x = 3,447.61