Finding the Fourth Proportional to 59.07, 88.62 and 42.79

Step by Step Solution

1. Step 1: Write the proportion equation
   59.07 : 88.62 = 42.79 : x
2. Step 2: Convert to fraction form
   59.07/88.62 = 42.79/x
3. Step 3: Cross multiply
   59.07x = 88.62 × 42.79
4. Step 4: Simplify right side
   59.07x = 3,792.05
5. Step 5: Solve for x
   x = 3,792.05/59.07
6. Step 6: Final answer
   x = 64.20