Finding the Fourth Proportional to 3,905.55, 5,389.13 and 2,333.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,905.55 : 5,389.13 = 2,333.31 : x
2. Step 2: Convert to fraction form
   3,905.55/5,389.13 = 2,333.31/x
3. Step 3: Cross multiply
   3,905.55x = 5,389.13 × 2,333.31
4. Step 4: Simplify right side
   3,905.55x = 12,574,510.92
5. Step 5: Solve for x
   x = 12,574,510.92/3,905.55
6. Step 6: Final answer
   x = 3,219.65