Finding the Fourth Proportional to 3,072.32, 4,608.78 and 1,223

Step by Step Solution

1. Step 1: Write the proportion equation
   3,072.32 : 4,608.78 = 1,223 : x
2. Step 2: Convert to fraction form
   3,072.32/4,608.78 = 1,223/x
3. Step 3: Cross multiply
   3,072.32x = 4,608.78 × 1,223
4. Step 4: Simplify right side
   3,072.32x = 5,636,531.83
5. Step 5: Solve for x
   x = 5,636,531.83/3,072.32
6. Step 6: Final answer
   x = 1,834.62