Finding the Fourth Proportional to 3,921.98, 5,411.89 and 2,328.06

Step by Step Solution

1. Step 1: Write the proportion equation
   3,921.98 : 5,411.89 = 2,328.06 : x
2. Step 2: Convert to fraction form
   3,921.98/5,411.89 = 2,328.06/x
3. Step 3: Cross multiply
   3,921.98x = 5,411.89 × 2,328.06
4. Step 4: Simplify right side
   3,921.98x = 12,599,204.63
5. Step 5: Solve for x
   x = 12,599,204.63/3,921.98
6. Step 6: Final answer
   x = 3,212.46