Finding the Fourth Proportional to 108.72, 150.10 and 71.93

Step by Step Solution

1. Step 1: Write the proportion equation
   108.72 : 150.10 = 71.93 : x
2. Step 2: Convert to fraction form
   108.72/150.10 = 71.93/x
3. Step 3: Cross multiply
   108.72x = 150.10 × 71.93
4. Step 4: Simplify right side
   108.72x = 10,796.96
5. Step 5: Solve for x
   x = 10,796.96/108.72
6. Step 6: Final answer
   x = 99.31