Finding the Fourth Proportional to 2,129.75, 2,939.81 and 1,233.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,129.75 : 2,939.81 = 1,233.89 : x
2. Step 2: Convert to fraction form
   2,129.75/2,939.81 = 1,233.89/x
3. Step 3: Cross multiply
   2,129.75x = 2,939.81 × 1,233.89
4. Step 4: Simplify right side
   2,129.75x = 3,627,399.26
5. Step 5: Solve for x
   x = 3,627,399.26/2,129.75
6. Step 6: Final answer
   x = 1,703.21