Finding the Fourth Proportional to 2,198.84, 3,298.82 and 1,620.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,198.84 : 3,298.82 = 1,620.72 : x
2. Step 2: Convert to fraction form
   2,198.84/3,298.82 = 1,620.72/x
3. Step 3: Cross multiply
   2,198.84x = 3,298.82 × 1,620.72
4. Step 4: Simplify right side
   2,198.84x = 5,346,455.45
5. Step 5: Solve for x
   x = 5,346,455.45/2,198.84
6. Step 6: Final answer
   x = 2,431.49