Finding the Fourth Proportional to 7,485.48, 10,330.07 and 4,128.71

Step by Step Solution

1. Step 1: Write the proportion equation
   7,485.48 : 10,330.07 = 4,128.71 : x
2. Step 2: Convert to fraction form
   7,485.48/10,330.07 = 4,128.71/x
3. Step 3: Cross multiply
   7,485.48x = 10,330.07 × 4,128.71
4. Step 4: Simplify right side
   7,485.48x = 42,649,791.02
5. Step 5: Solve for x
   x = 42,649,791.02/7,485.48
6. Step 6: Final answer
   x = 5,697.67