Finding the Fourth Proportional to 137.31, 189.72 and 131.37

Step by Step Solution

1. Step 1: Write the proportion equation
   137.31 : 189.72 = 131.37 : x
2. Step 2: Convert to fraction form
   137.31/189.72 = 131.37/x
3. Step 3: Cross multiply
   137.31x = 189.72 × 131.37
4. Step 4: Simplify right side
   137.31x = 24,923.52
5. Step 5: Solve for x
   x = 24,923.52/137.31
6. Step 6: Final answer
   x = 181.51