Finding the Fourth Proportional to 1,981.42, 2,734.40 and 1,142.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,981.42 : 2,734.40 = 1,142.16 : x
2. Step 2: Convert to fraction form
   1,981.42/2,734.40 = 1,142.16/x
3. Step 3: Cross multiply
   1,981.42x = 2,734.40 × 1,142.16
4. Step 4: Simplify right side
   1,981.42x = 3,123,122.30
5. Step 5: Solve for x
   x = 3,123,122.30/1,981.42
6. Step 6: Final answer
   x = 1,576.20