Finding the Fourth Proportional to 2,890.37, 4,335.82 and 810.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,890.37 : 4,335.82 = 810.37 : x
2. Step 2: Convert to fraction form
   2,890.37/4,335.82 = 810.37/x
3. Step 3: Cross multiply
   2,890.37x = 4,335.82 × 810.37
4. Step 4: Simplify right side
   2,890.37x = 3,513,596.77
5. Step 5: Solve for x
   x = 3,513,596.77/2,890.37
6. Step 6: Final answer
   x = 1,215.62