Finding the Fourth Proportional to 152.06, 227.82 and 86.72

Step by Step Solution

1. Step 1: Write the proportion equation
   152.06 : 227.82 = 86.72 : x
2. Step 2: Convert to fraction form
   152.06/227.82 = 86.72/x
3. Step 3: Cross multiply
   152.06x = 227.82 × 86.72
4. Step 4: Simplify right side
   152.06x = 19,756.55
5. Step 5: Solve for x
   x = 19,756.55/152.06
6. Step 6: Final answer
   x = 129.93