Finding the Fourth Proportional to 1,981.53, 2,734.90 and 1,142.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,981.53 : 2,734.90 = 1,142.20 : x
2. Step 2: Convert to fraction form
   1,981.53/2,734.90 = 1,142.20/x
3. Step 3: Cross multiply
   1,981.53x = 2,734.90 × 1,142.20
4. Step 4: Simplify right side
   1,981.53x = 3,123,803.34
5. Step 5: Solve for x
   x = 3,123,803.34/1,981.53
6. Step 6: Final answer
   x = 1,576.46