Finding the Fourth Proportional to 2,453.88, 3,681.05 and 810.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,453.88 : 3,681.05 = 810.03 : x
2. Step 2: Convert to fraction form
   2,453.88/3,681.05 = 810.03/x
3. Step 3: Cross multiply
   2,453.88x = 3,681.05 × 810.03
4. Step 4: Simplify right side
   2,453.88x = 2,981,760.93
5. Step 5: Solve for x
   x = 2,981,760.93/2,453.88
6. Step 6: Final answer
   x = 1,215.12