Finding the Fourth Proportional to 7,485.35, 10,329.63 and 4,128.48

Step by Step Solution

1. Step 1: Write the proportion equation
   7,485.35 : 10,329.63 = 4,128.48 : x
2. Step 2: Convert to fraction form
   7,485.35/10,329.63 = 4,128.48/x
3. Step 3: Cross multiply
   7,485.35x = 10,329.63 × 4,128.48
4. Step 4: Simplify right side
   7,485.35x = 42,645,670.86
5. Step 5: Solve for x
   x = 42,645,670.86/7,485.35
6. Step 6: Final answer
   x = 5,697.22