Finding the Fourth Proportional to 151.31, 208.72 and 104.69

Step by Step Solution

1. Step 1: Write the proportion equation
   151.31 : 208.72 = 104.69 : x
2. Step 2: Convert to fraction form
   151.31/208.72 = 104.69/x
3. Step 3: Cross multiply
   151.31x = 208.72 × 104.69
4. Step 4: Simplify right side
   151.31x = 21,849.85
5. Step 5: Solve for x
   x = 21,849.85/151.31
6. Step 6: Final answer
   x = 144.40