Finding the Fourth Proportional to 1,423.42, 1,960.38 and 1,226.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423.42 : 1,960.38 = 1,226.86 : x
2. Step 2: Convert to fraction form
   1,423.42/1,960.38 = 1,226.86/x
3. Step 3: Cross multiply
   1,423.42x = 1,960.38 × 1,226.86
4. Step 4: Simplify right side
   1,423.42x = 2,405,111.81
5. Step 5: Solve for x
   x = 2,405,111.81/1,423.42
6. Step 6: Final answer
   x = 1,689.67