Finding the Fourth Proportional to 2,123.04, 2,929.53 and 1,238.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.04 : 2,929.53 = 1,238.72 : x
2. Step 2: Convert to fraction form
   2,123.04/2,929.53 = 1,238.72/x
3. Step 3: Cross multiply
   2,123.04x = 2,929.53 × 1,238.72
4. Step 4: Simplify right side
   2,123.04x = 3,628,852.75
5. Step 5: Solve for x
   x = 3,628,852.75/2,123.04
6. Step 6: Final answer
   x = 1,709.27