Finding the Fourth Proportional to 13,315.54, 19,976.38 and 3,955.35

Step by Step Solution

1. Step 1: Write the proportion equation
   13,315.54 : 19,976.38 = 3,955.35 : x
2. Step 2: Convert to fraction form
   13,315.54/19,976.38 = 3,955.35/x
3. Step 3: Cross multiply
   13,315.54x = 19,976.38 × 3,955.35
4. Step 4: Simplify right side
   13,315.54x = 79,013,574.63
5. Step 5: Solve for x
   x = 79,013,574.63/13,315.54
6. Step 6: Final answer
   x = 5,933.94