Finding the Fourth Proportional to 3,970.28, 5,505.17 and 3,838.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,970.28 : 5,505.17 = 3,838.56 : x
2. Step 2: Convert to fraction form
   3,970.28/5,505.17 = 3,838.56/x
3. Step 3: Cross multiply
   3,970.28x = 5,505.17 × 3,838.56
4. Step 4: Simplify right side
   3,970.28x = 21,131,931.97
5. Step 5: Solve for x
   x = 21,131,931.97/3,970.28
6. Step 6: Final answer
   x = 5,322.53