Finding the Fourth Proportional to 7,014.20, 9,679.50 and 3,870.18

Step by Step Solution

1. Step 1: Write the proportion equation
   7,014.20 : 9,679.50 = 3,870.18 : x
2. Step 2: Convert to fraction form
   7,014.20/9,679.50 = 3,870.18/x
3. Step 3: Cross multiply
   7,014.20x = 9,679.50 × 3,870.18
4. Step 4: Simplify right side
   7,014.20x = 37,461,407.31
5. Step 5: Solve for x
   x = 37,461,407.31/7,014.20
6. Step 6: Final answer
   x = 5,340.80