Finding the Fourth Proportional to 59.20, 88.70 and 42.05

Step by Step Solution

1. Step 1: Write the proportion equation
   59.20 : 88.70 = 42.05 : x
2. Step 2: Convert to fraction form
   59.20/88.70 = 42.05/x
3. Step 3: Cross multiply
   59.20x = 88.70 × 42.05
4. Step 4: Simplify right side
   59.20x = 3,729.84
5. Step 5: Solve for x
   x = 3,729.84/59.20
6. Step 6: Final answer
   x = 63.00