Finding the Fourth Proportional to 1,981.45, 2,734.30 and 1,142.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,981.45 : 2,734.30 = 1,142.30 : x
2. Step 2: Convert to fraction form
   1,981.45/2,734.30 = 1,142.30/x
3. Step 3: Cross multiply
   1,981.45x = 2,734.30 × 1,142.30
4. Step 4: Simplify right side
   1,981.45x = 3,123,377.22
5. Step 5: Solve for x
   x = 3,123,377.22/1,981.45
6. Step 6: Final answer
   x = 1,576.31