Finding the Fourth Proportional to 57.98, 80.03 and 42.50

Step by Step Solution

1. Step 1: Write the proportion equation
   57.98 : 80.03 = 42.50 : x
2. Step 2: Convert to fraction form
   57.98/80.03 = 42.50/x
3. Step 3: Cross multiply
   57.98x = 80.03 × 42.50
4. Step 4: Simplify right side
   57.98x = 3,400.66
5. Step 5: Solve for x
   x = 3,400.66/57.98
6. Step 6: Final answer
   x = 58.65