Finding the Fourth Proportional to 1,009.01, 1,513.56 and 315.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,009.01 : 1,513.56 = 315.67 : x
2. Step 2: Convert to fraction form
   1,009.01/1,513.56 = 315.67/x
3. Step 3: Cross multiply
   1,009.01x = 1,513.56 × 315.67
4. Step 4: Simplify right side
   1,009.01x = 477,789.09
5. Step 5: Solve for x
   x = 477,789.09/1,009.01
6. Step 6: Final answer
   x = 473.52