Finding the Fourth Proportional to 2,154.12, 3,231.72 and 693.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,154.12 : 3,231.72 = 693.42 : x
2. Step 2: Convert to fraction form
   2,154.12/3,231.72 = 693.42/x
3. Step 3: Cross multiply
   2,154.12x = 3,231.72 × 693.42
4. Step 4: Simplify right side
   2,154.12x = 2,240,939.28
5. Step 5: Solve for x
   x = 2,240,939.28/2,154.12
6. Step 6: Final answer
   x = 1,040.30