Finding the Fourth Proportional to 1,433.24, 2,145.39 and 913.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.24 : 2,145.39 = 913.83 : x
2. Step 2: Convert to fraction form
   1,433.24/2,145.39 = 913.83/x
3. Step 3: Cross multiply
   1,433.24x = 2,145.39 × 913.83
4. Step 4: Simplify right side
   1,433.24x = 1,960,522.34
5. Step 5: Solve for x
   x = 1,960,522.34/1,433.24
6. Step 6: Final answer
   x = 1,367.89