Finding the Fourth Proportional to 1,039.34, 1,559.16 and 308.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,039.34 : 1,559.16 = 308.82 : x
2. Step 2: Convert to fraction form
   1,039.34/1,559.16 = 308.82/x
3. Step 3: Cross multiply
   1,039.34x = 1,559.16 × 308.82
4. Step 4: Simplify right side
   1,039.34x = 481,499.79
5. Step 5: Solve for x
   x = 481,499.79/1,039.34
6. Step 6: Final answer
   x = 463.27