Finding the Fourth Proportional to 2,128.22, 2,936.05 and 1,242.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.22 : 2,936.05 = 1,242.49 : x
2. Step 2: Convert to fraction form
   2,128.22/2,936.05 = 1,242.49/x
3. Step 3: Cross multiply
   2,128.22x = 2,936.05 × 1,242.49
4. Step 4: Simplify right side
   2,128.22x = 3,648,007.82
5. Step 5: Solve for x
   x = 3,648,007.82/2,128.22
6. Step 6: Final answer
   x = 1,714.11