Finding the Fourth Proportional to 3,089.61, 4,631.31 and 1,240.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,089.61 : 4,631.31 = 1,240.38 : x
2. Step 2: Convert to fraction form
   3,089.61/4,631.31 = 1,240.38/x
3. Step 3: Cross multiply
   3,089.61x = 4,631.31 × 1,240.38
4. Step 4: Simplify right side
   3,089.61x = 5,744,584.30
5. Step 5: Solve for x
   x = 5,744,584.30/3,089.61
6. Step 6: Final answer
   x = 1,859.32