Finding the Fourth Proportional to 2,196.48, 3,292.74 and 808.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.48 : 3,292.74 = 808.88 : x
2. Step 2: Convert to fraction form
   2,196.48/3,292.74 = 808.88/x
3. Step 3: Cross multiply
   2,196.48x = 3,292.74 × 808.88
4. Step 4: Simplify right side
   2,196.48x = 2,663,415.07
5. Step 5: Solve for x
   x = 2,663,415.07/2,196.48
6. Step 6: Final answer
   x = 1,212.58