Finding the Fourth Proportional to 1,791.10, 2,472.03 and 1,128.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,791.10 : 2,472.03 = 1,128.16 : x
2. Step 2: Convert to fraction form
   1,791.10/2,472.03 = 1,128.16/x
3. Step 3: Cross multiply
   1,791.10x = 2,472.03 × 1,128.16
4. Step 4: Simplify right side
   1,791.10x = 2,788,839.18
5. Step 5: Solve for x
   x = 2,788,839.18/1,791.10
6. Step 6: Final answer
   x = 1,557.06