Finding the Fourth Proportional to 1,423.68, 1,963.80 and 1,091.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423.68 : 1,963.80 = 1,091.58 : x
2. Step 2: Convert to fraction form
   1,423.68/1,963.80 = 1,091.58/x
3. Step 3: Cross multiply
   1,423.68x = 1,963.80 × 1,091.58
4. Step 4: Simplify right side
   1,423.68x = 2,143,644.80
5. Step 5: Solve for x
   x = 2,143,644.80/1,423.68
6. Step 6: Final answer
   x = 1,505.71