Finding the Fourth Proportional to 2,453.58, 3,680.82 and 810.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,453.58 : 3,680.82 = 810.18 : x
2. Step 2: Convert to fraction form
   2,453.58/3,680.82 = 810.18/x
3. Step 3: Cross multiply
   2,453.58x = 3,680.82 × 810.18
4. Step 4: Simplify right side
   2,453.58x = 2,982,126.75
5. Step 5: Solve for x
   x = 2,982,126.75/2,453.58
6. Step 6: Final answer
   x = 1,215.42