Finding the Fourth Proportional to 1,431.69, 1,974.82 and 1,116.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,431.69 : 1,974.82 = 1,116.44 : x
2. Step 2: Convert to fraction form
   1,431.69/1,974.82 = 1,116.44/x
3. Step 3: Cross multiply
   1,431.69x = 1,974.82 × 1,116.44
4. Step 4: Simplify right side
   1,431.69x = 2,204,768.04
5. Step 5: Solve for x
   x = 2,204,768.04/1,431.69
6. Step 6: Final answer
   x = 1,539.98