Finding the Fourth Proportional to 2,541.88, 3,813.18 and 810.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,541.88 : 3,813.18 = 810.52 : x
2. Step 2: Convert to fraction form
   2,541.88/3,813.18 = 810.52/x
3. Step 3: Cross multiply
   2,541.88x = 3,813.18 × 810.52
4. Step 4: Simplify right side
   2,541.88x = 3,090,658.65
5. Step 5: Solve for x
   x = 3,090,658.65/2,541.88
6. Step 6: Final answer
   x = 1,215.89