Finding the Fourth Proportional to 42.79, 59.10 and 34.59

Step by Step Solution

1. Step 1: Write the proportion equation
   42.79 : 59.10 = 34.59 : x
2. Step 2: Convert to fraction form
   42.79/59.10 = 34.59/x
3. Step 3: Cross multiply
   42.79x = 59.10 × 34.59
4. Step 4: Simplify right side
   42.79x = 2,044.27
5. Step 5: Solve for x
   x = 2,044.27/42.79
6. Step 6: Final answer
   x = 47.77