Finding the Fourth Proportional to 7,002.72, 9,664.20 and 3,859.20

Step by Step Solution

1. Step 1: Write the proportion equation
   7,002.72 : 9,664.20 = 3,859.20 : x
2. Step 2: Convert to fraction form
   7,002.72/9,664.20 = 3,859.20/x
3. Step 3: Cross multiply
   7,002.72x = 9,664.20 × 3,859.20
4. Step 4: Simplify right side
   7,002.72x = 37,296,080.64
5. Step 5: Solve for x
   x = 37,296,080.64/7,002.72
6. Step 6: Final answer
   x = 5,325.94