Finding the Fourth Proportional to 1,423.61, 1,965.49 and 920.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423.61 : 1,965.49 = 920.37 : x
2. Step 2: Convert to fraction form
   1,423.61/1,965.49 = 920.37/x
3. Step 3: Cross multiply
   1,423.61x = 1,965.49 × 920.37
4. Step 4: Simplify right side
   1,423.61x = 1,808,975.73
5. Step 5: Solve for x
   x = 1,808,975.73/1,423.61
6. Step 6: Final answer
   x = 1,270.70