Finding the Fourth Proportional to 2,123.01, 2,929.56 and 1,238.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.01 : 2,929.56 = 1,238.64 : x
2. Step 2: Convert to fraction form
   2,123.01/2,929.56 = 1,238.64/x
3. Step 3: Cross multiply
   2,123.01x = 2,929.56 × 1,238.64
4. Step 4: Simplify right side
   2,123.01x = 3,628,667.10
5. Step 5: Solve for x
   x = 3,628,667.10/2,123.01
6. Step 6: Final answer
   x = 1,709.21