Finding the Fourth Proportional to 2,123.34, 2,930.56 and 1,239.14

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.34 : 2,930.56 = 1,239.14 : x
2. Step 2: Convert to fraction form
   2,123.34/2,930.56 = 1,239.14/x
3. Step 3: Cross multiply
   2,123.34x = 2,930.56 × 1,239.14
4. Step 4: Simplify right side
   2,123.34x = 3,631,381.44
5. Step 5: Solve for x
   x = 3,631,381.44/2,123.34
6. Step 6: Final answer
   x = 1,710.22