Finding the Fourth Proportional to 100.82, 151.25 and 57.48

Step by Step Solution

1. Step 1: Write the proportion equation
   100.82 : 151.25 = 57.48 : x
2. Step 2: Convert to fraction form
   100.82/151.25 = 57.48/x
3. Step 3: Cross multiply
   100.82x = 151.25 × 57.48
4. Step 4: Simplify right side
   100.82x = 8,693.56
5. Step 5: Solve for x
   x = 8,693.56/100.82
6. Step 6: Final answer
   x = 86.23