Finding the Fourth Proportional to 59.99, 89.96 and 34.31

Step by Step Solution

1. Step 1: Write the proportion equation
   59.99 : 89.96 = 34.31 : x
2. Step 2: Convert to fraction form
   59.99/89.96 = 34.31/x
3. Step 3: Cross multiply
   59.99x = 89.96 × 34.31
4. Step 4: Simplify right side
   59.99x = 3,085.91
5. Step 5: Solve for x
   x = 3,085.91/59.99
6. Step 6: Final answer
   x = 51.44