Finding the Fourth Proportional to 7,105.24, 10,643.28 and 3,985.12

Step by Step Solution

1. Step 1: Write the proportion equation
   7,105.24 : 10,643.28 = 3,985.12 : x
2. Step 2: Convert to fraction form
   7,105.24/10,643.28 = 3,985.12/x
3. Step 3: Cross multiply
   7,105.24x = 10,643.28 × 3,985.12
4. Step 4: Simplify right side
   7,105.24x = 42,414,747.99
5. Step 5: Solve for x
   x = 42,414,747.99/7,105.24
6. Step 6: Final answer
   x = 5,969.50