Finding the Fourth Proportional to 1,423.62, 1,965.48 and 920.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423.62 : 1,965.48 = 920.34 : x
2. Step 2: Convert to fraction form
   1,423.62/1,965.48 = 920.34/x
3. Step 3: Cross multiply
   1,423.62x = 1,965.48 × 920.34
4. Step 4: Simplify right side
   1,423.62x = 1,808,909.86
5. Step 5: Solve for x
   x = 1,808,909.86/1,423.62
6. Step 6: Final answer
   x = 1,270.64