Finding the Fourth Proportional to 1,963.62, 2,947.59 and 810.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,963.62 : 2,947.59 = 810.18 : x
2. Step 2: Convert to fraction form
   1,963.62/2,947.59 = 810.18/x
3. Step 3: Cross multiply
   1,963.62x = 2,947.59 × 810.18
4. Step 4: Simplify right side
   1,963.62x = 2,388,078.47
5. Step 5: Solve for x
   x = 2,388,078.47/1,963.62
6. Step 6: Final answer
   x = 1,216.16