Finding the Fourth Proportional to 3,670.28, 5,478.76 and 3,399.94

Step by Step Solution

1. Step 1: Write the proportion equation
   3,670.28 : 5,478.76 = 3,399.94 : x
2. Step 2: Convert to fraction form
   3,670.28/5,478.76 = 3,399.94/x
3. Step 3: Cross multiply
   3,670.28x = 5,478.76 × 3,399.94
4. Step 4: Simplify right side
   3,670.28x = 18,627,455.27
5. Step 5: Solve for x
   x = 18,627,455.27/3,670.28
6. Step 6: Final answer
   x = 5,075.21