Finding the Fourth Proportional to 1,019.34, 1,528.58 and 316.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.34 : 1,528.58 = 316.46 : x
2. Step 2: Convert to fraction form
   1,019.34/1,528.58 = 316.46/x
3. Step 3: Cross multiply
   1,019.34x = 1,528.58 × 316.46
4. Step 4: Simplify right side
   1,019.34x = 483,739.04
5. Step 5: Solve for x
   x = 483,739.04/1,019.34
6. Step 6: Final answer
   x = 474.56