Finding the Fourth Proportional to 1,372.09, 1,894.98 and 931.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,372.09 : 1,894.98 = 931.18 : x
2. Step 2: Convert to fraction form
   1,372.09/1,894.98 = 931.18/x
3. Step 3: Cross multiply
   1,372.09x = 1,894.98 × 931.18
4. Step 4: Simplify right side
   1,372.09x = 1,764,567.48
5. Step 5: Solve for x
   x = 1,764,567.48/1,372.09
6. Step 6: Final answer
   x = 1,286.04