Finding the Fourth Proportional to 256.69, 354.25 and 151.82

Step by Step Solution

1. Step 1: Write the proportion equation
   256.69 : 354.25 = 151.82 : x
2. Step 2: Convert to fraction form
   256.69/354.25 = 151.82/x
3. Step 3: Cross multiply
   256.69x = 354.25 × 151.82
4. Step 4: Simplify right side
   256.69x = 53,783.55
5. Step 5: Solve for x
   x = 53,783.55/256.69
6. Step 6: Final answer
   x = 209.52