Finding the Fourth Proportional to 3,510.21, 5,239.98 and 2,986.71

Step by Step Solution

1. Step 1: Write the proportion equation
   3,510.21 : 5,239.98 = 2,986.71 : x
2. Step 2: Convert to fraction form
   3,510.21/5,239.98 = 2,986.71/x
3. Step 3: Cross multiply
   3,510.21x = 5,239.98 × 2,986.71
4. Step 4: Simplify right side
   3,510.21x = 15,650,300.67
5. Step 5: Solve for x
   x = 15,650,300.67/3,510.21
6. Step 6: Final answer
   x = 4,458.51