Finding the Fourth Proportional to 7,485.27, 10,330.18 and 4,128.09

Step by Step Solution

1. Step 1: Write the proportion equation
   7,485.27 : 10,330.18 = 4,128.09 : x
2. Step 2: Convert to fraction form
   7,485.27/10,330.18 = 4,128.09/x
3. Step 3: Cross multiply
   7,485.27x = 10,330.18 × 4,128.09
4. Step 4: Simplify right side
   7,485.27x = 42,643,912.76
5. Step 5: Solve for x
   x = 42,643,912.76/7,485.27
6. Step 6: Final answer
   x = 5,697.04