Finding the Fourth Proportional to 1,424.42, 1,961.76 and 1,227.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,424.42 : 1,961.76 = 1,227.86 : x
2. Step 2: Convert to fraction form
   1,424.42/1,961.76 = 1,227.86/x
3. Step 3: Cross multiply
   1,424.42x = 1,961.76 × 1,227.86
4. Step 4: Simplify right side
   1,424.42x = 2,408,766.63
5. Step 5: Solve for x
   x = 2,408,766.63/1,424.42
6. Step 6: Final answer
   x = 1,691.05