Finding the Fourth Proportional to 2,196.61, 3,294.84 and 553.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.61 : 3,294.84 = 553.18 : x
2. Step 2: Convert to fraction form
   2,196.61/3,294.84 = 553.18/x
3. Step 3: Cross multiply
   2,196.61x = 3,294.84 × 553.18
4. Step 4: Simplify right side
   2,196.61x = 1,822,639.59
5. Step 5: Solve for x
   x = 1,822,639.59/2,196.61
6. Step 6: Final answer
   x = 829.75