Finding the Fourth Proportional to 1,399.56, 1,931.48 and 927.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399.56 : 1,931.48 = 927.15 : x
2. Step 2: Convert to fraction form
   1,399.56/1,931.48 = 927.15/x
3. Step 3: Cross multiply
   1,399.56x = 1,931.48 × 927.15
4. Step 4: Simplify right side
   1,399.56x = 1,790,771.68
5. Step 5: Solve for x
   x = 1,790,771.68/1,399.56
6. Step 6: Final answer
   x = 1,279.52