Finding the Fourth Proportional to 1,380.76, 1,905.47 and 1,082.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380.76 : 1,905.47 = 1,082.38 : x
2. Step 2: Convert to fraction form
   1,380.76/1,905.47 = 1,082.38/x
3. Step 3: Cross multiply
   1,380.76x = 1,905.47 × 1,082.38
4. Step 4: Simplify right side
   1,380.76x = 2,062,442.62
5. Step 5: Solve for x
   x = 2,062,442.62/1,380.76
6. Step 6: Final answer
   x = 1,493.70