Finding the Fourth Proportional to 957.69, 1,436.72 and 308.39

Step by Step Solution

1. Step 1: Write the proportion equation
   957.69 : 1,436.72 = 308.39 : x
2. Step 2: Convert to fraction form
   957.69/1,436.72 = 308.39/x
3. Step 3: Cross multiply
   957.69x = 1,436.72 × 308.39
4. Step 4: Simplify right side
   957.69x = 443,061.36
5. Step 5: Solve for x
   x = 443,061.36/957.69
6. Step 6: Final answer
   x = 462.64