Finding the Fourth Proportional to 3,123.10, 4,683.18 and 931.06

Step by Step Solution

1. Step 1: Write the proportion equation
   3,123.10 : 4,683.18 = 931.06 : x
2. Step 2: Convert to fraction form
   3,123.10/4,683.18 = 931.06/x
3. Step 3: Cross multiply
   3,123.10x = 4,683.18 × 931.06
4. Step 4: Simplify right side
   3,123.10x = 4,360,321.57
5. Step 5: Solve for x
   x = 4,360,321.57/3,123.10
6. Step 6: Final answer
   x = 1,396.15