Finding the Fourth Proportional to 6,900.33, 10,358.75 and 4,128.30

Step by Step Solution

1. Step 1: Write the proportion equation
   6,900.33 : 10,358.75 = 4,128.30 : x
2. Step 2: Convert to fraction form
   6,900.33/10,358.75 = 4,128.30/x
3. Step 3: Cross multiply
   6,900.33x = 10,358.75 × 4,128.30
4. Step 4: Simplify right side
   6,900.33x = 42,764,064.23
5. Step 5: Solve for x
   x = 42,764,064.23/6,900.33
6. Step 6: Final answer
   x = 6,197.40