Finding the Fourth Proportional to 7,485.54, 10,330.50 and 4,128.34

Step by Step Solution

1. Step 1: Write the proportion equation
   7,485.54 : 10,330.50 = 4,128.34 : x
2. Step 2: Convert to fraction form
   7,485.54/10,330.50 = 4,128.34/x
3. Step 3: Cross multiply
   7,485.54x = 10,330.50 × 4,128.34
4. Step 4: Simplify right side
   7,485.54x = 42,647,816.37
5. Step 5: Solve for x
   x = 42,647,816.37/7,485.54
6. Step 6: Final answer
   x = 5,697.36