Finding the Fourth Proportional to 2,151.42, 3,226.82 and 690.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,151.42 : 3,226.82 = 690.38 : x
2. Step 2: Convert to fraction form
   2,151.42/3,226.82 = 690.38/x
3. Step 3: Cross multiply
   2,151.42x = 3,226.82 × 690.38
4. Step 4: Simplify right side
   2,151.42x = 2,227,741.78
5. Step 5: Solve for x
   x = 2,227,741.78/2,151.42
6. Step 6: Final answer
   x = 1,035.48