Finding the Fourth Proportional to 1,423.46, 1,965.34 and 1,091.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423.46 : 1,965.34 = 1,091.30 : x
2. Step 2: Convert to fraction form
   1,423.46/1,965.34 = 1,091.30/x
3. Step 3: Cross multiply
   1,423.46x = 1,965.34 × 1,091.30
4. Step 4: Simplify right side
   1,423.46x = 2,144,762.99
5. Step 5: Solve for x
   x = 2,144,762.99/1,423.46
6. Step 6: Final answer
   x = 1,506.73