Finding the Fourth Proportional to 3,412.89, 4,705.56 and 2,231.91

Step by Step Solution

1. Step 1: Write the proportion equation
   3,412.89 : 4,705.56 = 2,231.91 : x
2. Step 2: Convert to fraction form
   3,412.89/4,705.56 = 2,231.91/x
3. Step 3: Cross multiply
   3,412.89x = 4,705.56 × 2,231.91
4. Step 4: Simplify right side
   3,412.89x = 10,502,386.42
5. Step 5: Solve for x
   x = 10,502,386.42/3,412.89
6. Step 6: Final answer
   x = 3,077.27