Finding the Fourth Proportional to 2,123.80, 2,930.76 and 1,192.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.80 : 2,930.76 = 1,192.28 : x
2. Step 2: Convert to fraction form
   2,123.80/2,930.76 = 1,192.28/x
3. Step 3: Cross multiply
   2,123.80x = 2,930.76 × 1,192.28
4. Step 4: Simplify right side
   2,123.80x = 3,494,286.53
5. Step 5: Solve for x
   x = 3,494,286.53/2,123.80
6. Step 6: Final answer
   x = 1,645.30