Finding the Fourth Proportional to 1,086.84, 1,630.08 and 317.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.84 : 1,630.08 = 317.34 : x
2. Step 2: Convert to fraction form
   1,086.84/1,630.08 = 317.34/x
3. Step 3: Cross multiply
   1,086.84x = 1,630.08 × 317.34
4. Step 4: Simplify right side
   1,086.84x = 517,289.59
5. Step 5: Solve for x
   x = 517,289.59/1,086.84
6. Step 6: Final answer
   x = 475.96