Finding the Fourth Proportional to 1,391.43, 2,086.53 and 731.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,391.43 : 2,086.53 = 731.82 : x
2. Step 2: Convert to fraction form
   1,391.43/2,086.53 = 731.82/x
3. Step 3: Cross multiply
   1,391.43x = 2,086.53 × 731.82
4. Step 4: Simplify right side
   1,391.43x = 1,526,964.38
5. Step 5: Solve for x
   x = 1,526,964.38/1,391.43
6. Step 6: Final answer
   x = 1,097.41