Finding the Fourth Proportional to 114.70, 171.98 and 42.50

Step by Step Solution

1. Step 1: Write the proportion equation
   114.70 : 171.98 = 42.50 : x
2. Step 2: Convert to fraction form
   114.70/171.98 = 42.50/x
3. Step 3: Cross multiply
   114.70x = 171.98 × 42.50
4. Step 4: Simplify right side
   114.70x = 7,309.15
5. Step 5: Solve for x
   x = 7,309.15/114.70
6. Step 6: Final answer
   x = 63.72