Finding the Fourth Proportional to 59.94, 89.91 and 42.12

Step by Step Solution

1. Step 1: Write the proportion equation
   59.94 : 89.91 = 42.12 : x
2. Step 2: Convert to fraction form
   59.94/89.91 = 42.12/x
3. Step 3: Cross multiply
   59.94x = 89.91 × 42.12
4. Step 4: Simplify right side
   59.94x = 3,787.01
5. Step 5: Solve for x
   x = 3,787.01/59.94
6. Step 6: Final answer
   x = 63.18