Finding the Fourth Proportional to 1,423.69, 2,133.22 and 1,129.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423.69 : 2,133.22 = 1,129.59 : x
2. Step 2: Convert to fraction form
   1,423.69/2,133.22 = 1,129.59/x
3. Step 3: Cross multiply
   1,423.69x = 2,133.22 × 1,129.59
4. Step 4: Simplify right side
   1,423.69x = 2,409,674.88
5. Step 5: Solve for x
   x = 2,409,674.88/1,423.69
6. Step 6: Final answer
   x = 1,692.56