Finding the Fourth Proportional to 2,405.48, 3,312.42 and 2,231.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,405.48 : 3,312.42 = 2,231.24 : x
2. Step 2: Convert to fraction form
   2,405.48/3,312.42 = 2,231.24/x
3. Step 3: Cross multiply
   2,405.48x = 3,312.42 × 2,231.24
4. Step 4: Simplify right side
   2,405.48x = 7,390,804.00
5. Step 5: Solve for x
   x = 7,390,804.00/2,405.48
6. Step 6: Final answer
   x = 3,072.49