Finding the Fourth Proportional to 2,616.84, 3,923.58 and 1,228.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,616.84 : 3,923.58 = 1,228.32 : x
2. Step 2: Convert to fraction form
   2,616.84/3,923.58 = 1,228.32/x
3. Step 3: Cross multiply
   2,616.84x = 3,923.58 × 1,228.32
4. Step 4: Simplify right side
   2,616.84x = 4,819,411.79
5. Step 5: Solve for x
   x = 4,819,411.79/2,616.84
6. Step 6: Final answer
   x = 1,841.69