Finding the Fourth Proportional to 2,131.48, 3,196.31 and 744.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.48 : 3,196.31 = 744.40 : x
2. Step 2: Convert to fraction form
   2,131.48/3,196.31 = 744.40/x
3. Step 3: Cross multiply
   2,131.48x = 3,196.31 × 744.40
4. Step 4: Simplify right side
   2,131.48x = 2,379,329.44
5. Step 5: Solve for x
   x = 2,379,329.44/2,131.48
6. Step 6: Final answer
   x = 1,116.28