Finding the Fourth Proportional to 2,128.00, 2,936.65 and 1,243.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.00 : 2,936.65 = 1,243.63 : x
2. Step 2: Convert to fraction form
   2,128.00/2,936.65 = 1,243.63/x
3. Step 3: Cross multiply
   2,128.00x = 2,936.65 × 1,243.63
4. Step 4: Simplify right side
   2,128.00x = 3,652,091.36
5. Step 5: Solve for x
   x = 3,652,091.36/2,128.00
6. Step 6: Final answer
   x = 1,716.21