Finding the Fourth Proportional to 1,009.69, 1,514.70 and 316.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,009.69 : 1,514.70 = 316.22 : x
2. Step 2: Convert to fraction form
   1,009.69/1,514.70 = 316.22/x
3. Step 3: Cross multiply
   1,009.69x = 1,514.70 × 316.22
4. Step 4: Simplify right side
   1,009.69x = 478,978.43
5. Step 5: Solve for x
   x = 478,978.43/1,009.69
6. Step 6: Final answer
   x = 474.38