Finding the Fourth Proportional to 7,485.55, 10,330.14 and 4,128.37

Step by Step Solution

1. Step 1: Write the proportion equation
   7,485.55 : 10,330.14 = 4,128.37 : x
2. Step 2: Convert to fraction form
   7,485.55/10,330.14 = 4,128.37/x
3. Step 3: Cross multiply
   7,485.55x = 10,330.14 × 4,128.37
4. Step 4: Simplify right side
   7,485.55x = 42,646,640.07
5. Step 5: Solve for x
   x = 42,646,640.07/7,485.55
6. Step 6: Final answer
   x = 5,697.20