Finding the Fourth Proportional to 1,141.34, 1,711.98 and 319.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,141.34 : 1,711.98 = 319.59 : x
2. Step 2: Convert to fraction form
   1,141.34/1,711.98 = 319.59/x
3. Step 3: Cross multiply
   1,141.34x = 1,711.98 × 319.59
4. Step 4: Simplify right side
   1,141.34x = 547,131.69
5. Step 5: Solve for x
   x = 547,131.69/1,141.34
6. Step 6: Final answer
   x = 479.38