Finding the Fourth Proportional to 3,719.97, 5,574.38 and 2,156.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,719.97 : 5,574.38 = 2,156.31 : x
2. Step 2: Convert to fraction form
   3,719.97/5,574.38 = 2,156.31/x
3. Step 3: Cross multiply
   3,719.97x = 5,574.38 × 2,156.31
4. Step 4: Simplify right side
   3,719.97x = 12,020,080.56
5. Step 5: Solve for x
   x = 12,020,080.56/3,719.97
6. Step 6: Final answer
   x = 3,231.23