Finding the Fourth Proportional to 2,151.47, 3,227.27 and 690.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,151.47 : 3,227.27 = 690.42 : x
2. Step 2: Convert to fraction form
   2,151.47/3,227.27 = 690.42/x
3. Step 3: Cross multiply
   2,151.47x = 3,227.27 × 690.42
4. Step 4: Simplify right side
   2,151.47x = 2,228,168.30
5. Step 5: Solve for x
   x = 2,228,168.30/2,151.47
6. Step 6: Final answer
   x = 1,035.65