Finding the Fourth Proportional to 8,853.82, 13,274.51 and 3,920.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,853.82 : 13,274.51 = 3,920.78 : x
2. Step 2: Convert to fraction form
   8,853.82/13,274.51 = 3,920.78/x
3. Step 3: Cross multiply
   8,853.82x = 13,274.51 × 3,920.78
4. Step 4: Simplify right side
   8,853.82x = 52,046,433.32
5. Step 5: Solve for x
   x = 52,046,433.32/8,853.82
6. Step 6: Final answer
   x = 5,878.42