Finding the Fourth Proportional to 3,981.89, 5,966.64 and 1,515.39

Step by Step Solution

1. Step 1: Write the proportion equation
   3,981.89 : 5,966.64 = 1,515.39 : x
2. Step 2: Convert to fraction form
   3,981.89/5,966.64 = 1,515.39/x
3. Step 3: Cross multiply
   3,981.89x = 5,966.64 × 1,515.39
4. Step 4: Simplify right side
   3,981.89x = 9,041,786.59
5. Step 5: Solve for x
   x = 9,041,786.59/3,981.89
6. Step 6: Final answer
   x = 2,270.73