Finding the Fourth Proportional to 2,288.72, 3,428.76 and 2,198

Step by Step Solution

1. Step 1: Write the proportion equation
   2,288.72 : 3,428.76 = 2,198 : x
2. Step 2: Convert to fraction form
   2,288.72/3,428.76 = 2,198/x
3. Step 3: Cross multiply
   2,288.72x = 3,428.76 × 2,198
4. Step 4: Simplify right side
   2,288.72x = 7,536,414.48
5. Step 5: Solve for x
   x = 7,536,414.48/2,288.72
6. Step 6: Final answer
   x = 3,292.85