Finding the Fourth Proportional to 7,384.78, 10,191.25 and 4,198.21

Step by Step Solution

1. Step 1: Write the proportion equation
   7,384.78 : 10,191.25 = 4,198.21 : x
2. Step 2: Convert to fraction form
   7,384.78/10,191.25 = 4,198.21/x
3. Step 3: Cross multiply
   7,384.78x = 10,191.25 × 4,198.21
4. Step 4: Simplify right side
   7,384.78x = 42,785,007.66
5. Step 5: Solve for x
   x = 42,785,007.66/7,384.78
6. Step 6: Final answer
   x = 5,793.67