Finding the Fourth Proportional to 152.98, 229.55 and 71.88

Step by Step Solution

1. Step 1: Write the proportion equation
   152.98 : 229.55 = 71.88 : x
2. Step 2: Convert to fraction form
   152.98/229.55 = 71.88/x
3. Step 3: Cross multiply
   152.98x = 229.55 × 71.88
4. Step 4: Simplify right side
   152.98x = 16,499.69
5. Step 5: Solve for x
   x = 16,499.69/152.98
6. Step 6: Final answer
   x = 107.86