Finding the Fourth Proportional to 2,123.78, 2,930.67 and 1,179.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.78 : 2,930.67 = 1,179.49 : x
2. Step 2: Convert to fraction form
   2,123.78/2,930.67 = 1,179.49/x
3. Step 3: Cross multiply
   2,123.78x = 2,930.67 × 1,179.49
4. Step 4: Simplify right side
   2,123.78x = 3,456,704.04
5. Step 5: Solve for x
   x = 3,456,704.04/2,123.78
6. Step 6: Final answer
   x = 1,627.62