Finding the Fourth Proportional to 2,371.25, 3,555.57 and 810.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,371.25 : 3,555.57 = 810.38 : x
2. Step 2: Convert to fraction form
   2,371.25/3,555.57 = 810.38/x
3. Step 3: Cross multiply
   2,371.25x = 3,555.57 × 810.38
4. Step 4: Simplify right side
   2,371.25x = 2,881,362.82
5. Step 5: Solve for x
   x = 2,881,362.82/2,371.25
6. Step 6: Final answer
   x = 1,215.12