Finding the Fourth Proportional to 3,691.17, 5,538.78 and 1,499.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,691.17 : 5,538.78 = 1,499.31 : x
2. Step 2: Convert to fraction form
   3,691.17/5,538.78 = 1,499.31/x
3. Step 3: Cross multiply
   3,691.17x = 5,538.78 × 1,499.31
4. Step 4: Simplify right side
   3,691.17x = 8,304,348.24
5. Step 5: Solve for x
   x = 8,304,348.24/3,691.17
6. Step 6: Final answer
   x = 2,249.79