Finding the Fourth Proportional to 1,082.35, 1,623.72 and 433.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,082.35 : 1,623.72 = 433.09 : x
2. Step 2: Convert to fraction form
   1,082.35/1,623.72 = 433.09/x
3. Step 3: Cross multiply
   1,082.35x = 1,623.72 × 433.09
4. Step 4: Simplify right side
   1,082.35x = 703,216.89
5. Step 5: Solve for x
   x = 703,216.89/1,082.35
6. Step 6: Final answer
   x = 649.71