Finding the Fourth Proportional to 7,485.94, 10,330.12 and 4,128.58

Step by Step Solution

1. Step 1: Write the proportion equation
   7,485.94 : 10,330.12 = 4,128.58 : x
2. Step 2: Convert to fraction form
   7,485.94/10,330.12 = 4,128.58/x
3. Step 3: Cross multiply
   7,485.94x = 10,330.12 × 4,128.58
4. Step 4: Simplify right side
   7,485.94x = 42,648,726.83
5. Step 5: Solve for x
   x = 42,648,726.83/7,485.94
6. Step 6: Final answer
   x = 5,697.18