Finding the Fourth Proportional to 7,485.94, 10,330.10 and 4,128.56

Step by Step Solution

1. Step 1: Write the proportion equation
   7,485.94 : 10,330.10 = 4,128.56 : x
2. Step 2: Convert to fraction form
   7,485.94/10,330.10 = 4,128.56/x
3. Step 3: Cross multiply
   7,485.94x = 10,330.10 × 4,128.56
4. Step 4: Simplify right side
   7,485.94x = 42,648,437.66
5. Step 5: Solve for x
   x = 42,648,437.66/7,485.94
6. Step 6: Final answer
   x = 5,697.14