Finding the Fourth Proportional to 3,927.53, 5,418.82 and 3,553.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,927.53 : 5,418.82 = 3,553.31 : x
2. Step 2: Convert to fraction form
   3,927.53/5,418.82 = 3,553.31/x
3. Step 3: Cross multiply
   3,927.53x = 5,418.82 × 3,553.31
4. Step 4: Simplify right side
   3,927.53x = 19,254,747.29
5. Step 5: Solve for x
   x = 19,254,747.29/3,927.53
6. Step 6: Final answer
   x = 4,902.51