Finding the Fourth Proportional to 5,454.54, 8,185.89 and 2,123.31

Step by Step Solution

1. Step 1: Write the proportion equation
   5,454.54 : 8,185.89 = 2,123.31 : x
2. Step 2: Convert to fraction form
   5,454.54/8,185.89 = 2,123.31/x
3. Step 3: Cross multiply
   5,454.54x = 8,185.89 × 2,123.31
4. Step 4: Simplify right side
   5,454.54x = 17,381,182.10
5. Step 5: Solve for x
   x = 17,381,182.10/5,454.54
6. Step 6: Final answer
   x = 3,186.55