Finding the Fourth Proportional to 101.01, 151.17 and 71.98

Step by Step Solution

1. Step 1: Write the proportion equation
   101.01 : 151.17 = 71.98 : x
2. Step 2: Convert to fraction form
   101.01/151.17 = 71.98/x
3. Step 3: Cross multiply
   101.01x = 151.17 × 71.98
4. Step 4: Simplify right side
   101.01x = 10,881.22
5. Step 5: Solve for x
   x = 10,881.22/101.01
6. Step 6: Final answer
   x = 107.72