Finding the Fourth Proportional to 1,981.57, 2,734.77 and 1,142.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,981.57 : 2,734.77 = 1,142.31 : x
2. Step 2: Convert to fraction form
   1,981.57/2,734.77 = 1,142.31/x
3. Step 3: Cross multiply
   1,981.57x = 2,734.77 × 1,142.31
4. Step 4: Simplify right side
   1,981.57x = 3,123,955.12
5. Step 5: Solve for x
   x = 3,123,955.12/1,981.57
6. Step 6: Final answer
   x = 1,576.51