Finding the Fourth Proportional to 2,128.47, 2,936.82 and 1,244.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.47 : 2,936.82 = 1,244.55 : x
2. Step 2: Convert to fraction form
   2,128.47/2,936.82 = 1,244.55/x
3. Step 3: Cross multiply
   2,128.47x = 2,936.82 × 1,244.55
4. Step 4: Simplify right side
   2,128.47x = 3,655,019.33
5. Step 5: Solve for x
   x = 3,655,019.33/2,128.47
6. Step 6: Final answer
   x = 1,717.21