Finding the Fourth Proportional to 115.98, 174.01 and 42.86

Step by Step Solution

1. Step 1: Write the proportion equation
   115.98 : 174.01 = 42.86 : x
2. Step 2: Convert to fraction form
   115.98/174.01 = 42.86/x
3. Step 3: Cross multiply
   115.98x = 174.01 × 42.86
4. Step 4: Simplify right side
   115.98x = 7,458.40
5. Step 5: Solve for x
   x = 7,458.40/115.98
6. Step 6: Final answer
   x = 64.31