Finding the Fourth Proportional to 1,963.98, 2,947.59 and 810.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,963.98 : 2,947.59 = 810.54 : x
2. Step 2: Convert to fraction form
   1,963.98/2,947.59 = 810.54/x
3. Step 3: Cross multiply
   1,963.98x = 2,947.59 × 810.54
4. Step 4: Simplify right side
   1,963.98x = 2,389,139.60
5. Step 5: Solve for x
   x = 2,389,139.60/1,963.98
6. Step 6: Final answer
   x = 1,216.48