Finding the Fourth Proportional to 1,119.73, 1,542.71 and 839.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,119.73 : 1,542.71 = 839.53 : x
2. Step 2: Convert to fraction form
   1,119.73/1,542.71 = 839.53/x
3. Step 3: Cross multiply
   1,119.73x = 1,542.71 × 839.53
4. Step 4: Simplify right side
   1,119.73x = 1,295,139.42
5. Step 5: Solve for x
   x = 1,295,139.42/1,119.73
6. Step 6: Final answer
   x = 1,156.65