Finding the Fourth Proportional to 2,123.27, 2,930.78 and 1,239.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.27 : 2,930.78 = 1,239.24 : x
2. Step 2: Convert to fraction form
   2,123.27/2,930.78 = 1,239.24/x
3. Step 3: Cross multiply
   2,123.27x = 2,930.78 × 1,239.24
4. Step 4: Simplify right side
   2,123.27x = 3,631,939.81
5. Step 5: Solve for x
   x = 3,631,939.81/2,123.27
6. Step 6: Final answer
   x = 1,710.54