Finding the Fourth Proportional to 2,291.31, 3,436.78 and 731.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,291.31 : 3,436.78 = 731.25 : x
2. Step 2: Convert to fraction form
   2,291.31/3,436.78 = 731.25/x
3. Step 3: Cross multiply
   2,291.31x = 3,436.78 × 731.25
4. Step 4: Simplify right side
   2,291.31x = 2,513,145.38
5. Step 5: Solve for x
   x = 2,513,145.38/2,291.31
6. Step 6: Final answer
   x = 1,096.82