Finding the Fourth Proportional to 101.72, 152.55 and 83.76

Step by Step Solution

1. Step 1: Write the proportion equation
   101.72 : 152.55 = 83.76 : x
2. Step 2: Convert to fraction form
   101.72/152.55 = 83.76/x
3. Step 3: Cross multiply
   101.72x = 152.55 × 83.76
4. Step 4: Simplify right side
   101.72x = 12,777.59
5. Step 5: Solve for x
   x = 12,777.59/101.72
6. Step 6: Final answer
   x = 125.62