Finding the Fourth Proportional to 1,431.71, 1,974.47 and 983.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,431.71 : 1,974.47 = 983.37 : x
2. Step 2: Convert to fraction form
   1,431.71/1,974.47 = 983.37/x
3. Step 3: Cross multiply
   1,431.71x = 1,974.47 × 983.37
4. Step 4: Simplify right side
   1,431.71x = 1,941,634.56
5. Step 5: Solve for x
   x = 1,941,634.56/1,431.71
6. Step 6: Final answer
   x = 1,356.16