Finding the Fourth Proportional to 156.27, 214.42 and 154.82

Step by Step Solution

1. Step 1: Write the proportion equation
   156.27 : 214.42 = 154.82 : x
2. Step 2: Convert to fraction form
   156.27/214.42 = 154.82/x
3. Step 3: Cross multiply
   156.27x = 214.42 × 154.82
4. Step 4: Simplify right side
   156.27x = 33,196.50
5. Step 5: Solve for x
   x = 33,196.50/156.27
6. Step 6: Final answer
   x = 212.43