Finding the Fourth Proportional to 2,167.31, 3,253.76 and 1,128.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,167.31 : 3,253.76 = 1,128.03 : x
2. Step 2: Convert to fraction form
   2,167.31/3,253.76 = 1,128.03/x
3. Step 3: Cross multiply
   2,167.31x = 3,253.76 × 1,128.03
4. Step 4: Simplify right side
   2,167.31x = 3,670,323.69
5. Step 5: Solve for x
   x = 3,670,323.69/2,167.31
6. Step 6: Final answer
   x = 1,693.50