Finding the Fourth Proportional to 7,443.28, 10,271.69 and 4,086.15

Step by Step Solution

1. Step 1: Write the proportion equation
   7,443.28 : 10,271.69 = 4,086.15 : x
2. Step 2: Convert to fraction form
   7,443.28/10,271.69 = 4,086.15/x
3. Step 3: Cross multiply
   7,443.28x = 10,271.69 × 4,086.15
4. Step 4: Simplify right side
   7,443.28x = 41,971,645.66
5. Step 5: Solve for x
   x = 41,971,645.66/7,443.28
6. Step 6: Final answer
   x = 5,638.86