Finding the Fourth Proportional to 1,096.74, 1,644.84 and 316.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,096.74 : 1,644.84 = 316.71 : x
2. Step 2: Convert to fraction form
   1,096.74/1,644.84 = 316.71/x
3. Step 3: Cross multiply
   1,096.74x = 1,644.84 × 316.71
4. Step 4: Simplify right side
   1,096.74x = 520,937.28
5. Step 5: Solve for x
   x = 520,937.28/1,096.74
6. Step 6: Final answer
   x = 474.99