Finding the Fourth Proportional to 2,758.38, 4,137.50 and 810.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,758.38 : 4,137.50 = 810.59 : x
2. Step 2: Convert to fraction form
   2,758.38/4,137.50 = 810.59/x
3. Step 3: Cross multiply
   2,758.38x = 4,137.50 × 810.59
4. Step 4: Simplify right side
   2,758.38x = 3,353,791.38
5. Step 5: Solve for x
   x = 3,353,791.38/2,758.38
6. Step 6: Final answer
   x = 1,215.86