Finding the Fourth Proportional to 7,485.08, 10,329.39 and 4,128.10

Step by Step Solution

1. Step 1: Write the proportion equation
   7,485.08 : 10,329.39 = 4,128.10 : x
2. Step 2: Convert to fraction form
   7,485.08/10,329.39 = 4,128.10/x
3. Step 3: Cross multiply
   7,485.08x = 10,329.39 × 4,128.10
4. Step 4: Simplify right side
   7,485.08x = 42,640,729.04
5. Step 5: Solve for x
   x = 42,640,729.04/7,485.08
6. Step 6: Final answer
   x = 5,696.77