Finding the Fourth Proportional to 2,231.91, 3,347.83 and 543.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,231.91 : 3,347.83 = 543.31 : x
2. Step 2: Convert to fraction form
   2,231.91/3,347.83 = 543.31/x
3. Step 3: Cross multiply
   2,231.91x = 3,347.83 × 543.31
4. Step 4: Simplify right side
   2,231.91x = 1,818,912.42
5. Step 5: Solve for x
   x = 1,818,912.42/2,231.91
6. Step 6: Final answer
   x = 814.96