Finding the Fourth Proportional to 7,485.58, 10,330.32 and 4,128.49

Step by Step Solution

1. Step 1: Write the proportion equation
   7,485.58 : 10,330.32 = 4,128.49 : x
2. Step 2: Convert to fraction form
   7,485.58/10,330.32 = 4,128.49/x
3. Step 3: Cross multiply
   7,485.58x = 10,330.32 × 4,128.49
4. Step 4: Simplify right side
   7,485.58x = 42,648,622.82
5. Step 5: Solve for x
   x = 42,648,622.82/7,485.58
6. Step 6: Final answer
   x = 5,697.44