Finding the Fourth Proportional to 1,123.31, 1,683.56 and 877.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.31 : 1,683.56 = 877.26 : x
2. Step 2: Convert to fraction form
   1,123.31/1,683.56 = 877.26/x
3. Step 3: Cross multiply
   1,123.31x = 1,683.56 × 877.26
4. Step 4: Simplify right side
   1,123.31x = 1,476,915.46
5. Step 5: Solve for x
   x = 1,476,915.46/1,123.31
6. Step 6: Final answer
   x = 1,314.79