Finding the Fourth Proportional to 6,510.05, 8,984.76 and 3,991.71

Step by Step Solution

1. Step 1: Write the proportion equation
   6,510.05 : 8,984.76 = 3,991.71 : x
2. Step 2: Convert to fraction form
   6,510.05/8,984.76 = 3,991.71/x
3. Step 3: Cross multiply
   6,510.05x = 8,984.76 × 3,991.71
4. Step 4: Simplify right side
   6,510.05x = 35,864,556.34
5. Step 5: Solve for x
   x = 35,864,556.34/6,510.05
6. Step 6: Final answer
   x = 5,509.11