Finding the Fourth Proportional to 100.58, 150.89 and 39.74

Step by Step Solution

1. Step 1: Write the proportion equation
   100.58 : 150.89 = 39.74 : x
2. Step 2: Convert to fraction form
   100.58/150.89 = 39.74/x
3. Step 3: Cross multiply
   100.58x = 150.89 × 39.74
4. Step 4: Simplify right side
   100.58x = 5,995.42
5. Step 5: Solve for x
   x = 5,995.42/100.58
6. Step 6: Final answer
   x = 59.61