Finding the Fourth Proportional to 100.86, 151.31 and 35.86

Step by Step Solution

1. Step 1: Write the proportion equation
   100.86 : 151.31 = 35.86 : x
2. Step 2: Convert to fraction form
   100.86/151.31 = 35.86/x
3. Step 3: Cross multiply
   100.86x = 151.31 × 35.86
4. Step 4: Simplify right side
   100.86x = 5,425.97
5. Step 5: Solve for x
   x = 5,425.97/100.86
6. Step 6: Final answer
   x = 53.80