Finding the Fourth Proportional to 43.52, 59.99 and 42.15

Step by Step Solution

1. Step 1: Write the proportion equation
   43.52 : 59.99 = 42.15 : x
2. Step 2: Convert to fraction form
   43.52/59.99 = 42.15/x
3. Step 3: Cross multiply
   43.52x = 59.99 × 42.15
4. Step 4: Simplify right side
   43.52x = 2,528.49
5. Step 5: Solve for x
   x = 2,528.49/43.52
6. Step 6: Final answer
   x = 58.11