Finding the Fourth Proportional to 1,123.89, 1,687.73 and 846.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.89 : 1,687.73 = 846.27 : x
2. Step 2: Convert to fraction form
   1,123.89/1,687.73 = 846.27/x
3. Step 3: Cross multiply
   1,123.89x = 1,687.73 × 846.27
4. Step 4: Simplify right side
   1,123.89x = 1,428,271.04
5. Step 5: Solve for x
   x = 1,428,271.04/1,123.89
6. Step 6: Final answer
   x = 1,270.83