Finding the Fourth Proportional to 2,164.42, 3,245.73 and 931.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,164.42 : 3,245.73 = 931.18 : x
2. Step 2: Convert to fraction form
   2,164.42/3,245.73 = 931.18/x
3. Step 3: Cross multiply
   2,164.42x = 3,245.73 × 931.18
4. Step 4: Simplify right side
   2,164.42x = 3,022,358.86
5. Step 5: Solve for x
   x = 3,022,358.86/2,164.42
6. Step 6: Final answer
   x = 1,396.38