Finding the Fourth Proportional to 4,231.30, 5,912.30 and 4,231.30

Step by Step Solution

1. Step 1: Write the proportion equation
   4,231.30 : 5,912.30 = 4,231.30 : x
2. Step 2: Convert to fraction form
   4,231.30/5,912.30 = 4,231.30/x
3. Step 3: Cross multiply
   4,231.30x = 5,912.30 × 4,231.30
4. Step 4: Simplify right side
   4,231.30x = 25,016,714.99
5. Step 5: Solve for x
   x = 25,016,714.99/4,231.30
6. Step 6: Final answer
   x = 5,912.30