Finding the Fourth Proportional to 2,128.82, 2,938.12 and 1,244.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.82 : 2,938.12 = 1,244.45 : x
2. Step 2: Convert to fraction form
   2,128.82/2,938.12 = 1,244.45/x
3. Step 3: Cross multiply
   2,128.82x = 2,938.12 × 1,244.45
4. Step 4: Simplify right side
   2,128.82x = 3,656,343.43
5. Step 5: Solve for x
   x = 3,656,343.43/2,128.82
6. Step 6: Final answer
   x = 1,717.54