Finding the Fourth Proportional to 2,072.47, 2,860.02 and 1,128.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.47 : 2,860.02 = 1,128.28 : x
2. Step 2: Convert to fraction form
   2,072.47/2,860.02 = 1,128.28/x
3. Step 3: Cross multiply
   2,072.47x = 2,860.02 × 1,128.28
4. Step 4: Simplify right side
   2,072.47x = 3,226,903.37
5. Step 5: Solve for x
   x = 3,226,903.37/2,072.47
6. Step 6: Final answer
   x = 1,557.03