Finding the Fourth Proportional to 100.69, 151.29 and 57.35

Step by Step Solution

1. Step 1: Write the proportion equation
   100.69 : 151.29 = 57.35 : x
2. Step 2: Convert to fraction form
   100.69/151.29 = 57.35/x
3. Step 3: Cross multiply
   100.69x = 151.29 × 57.35
4. Step 4: Simplify right side
   100.69x = 8,676.86
5. Step 5: Solve for x
   x = 8,676.86/100.69
6. Step 6: Final answer
   x = 86.18