Finding the Fourth Proportional to 342.83, 514.31 and 137.31

Step by Step Solution

1. Step 1: Write the proportion equation
   342.83 : 514.31 = 137.31 : x
2. Step 2: Convert to fraction form
   342.83/514.31 = 137.31/x
3. Step 3: Cross multiply
   342.83x = 514.31 × 137.31
4. Step 4: Simplify right side
   342.83x = 70,619.22
5. Step 5: Solve for x
   x = 70,619.22/342.83
6. Step 6: Final answer
   x = 205.99