Finding the Fourth Proportional to 42.99, 59.31 and 34.77

Step by Step Solution

1. Step 1: Write the proportion equation
   42.99 : 59.31 = 34.77 : x
2. Step 2: Convert to fraction form
   42.99/59.31 = 34.77/x
3. Step 3: Cross multiply
   42.99x = 59.31 × 34.77
4. Step 4: Simplify right side
   42.99x = 2,062.21
5. Step 5: Solve for x
   x = 2,062.21/42.99
6. Step 6: Final answer
   x = 47.97