Finding the Fourth Proportional to 2,196.88, 3,295.54 and 810.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.88 : 3,295.54 = 810.58 : x
2. Step 2: Convert to fraction form
   2,196.88/3,295.54 = 810.58/x
3. Step 3: Cross multiply
   2,196.88x = 3,295.54 × 810.58
4. Step 4: Simplify right side
   2,196.88x = 2,671,298.81
5. Step 5: Solve for x
   x = 2,671,298.81/2,196.88
6. Step 6: Final answer
   x = 1,215.95