Finding the Fourth Proportional to 42.18, 58.17 and 29.23

Step by Step Solution

1. Step 1: Write the proportion equation
   42.18 : 58.17 = 29.23 : x
2. Step 2: Convert to fraction form
   42.18/58.17 = 29.23/x
3. Step 3: Cross multiply
   42.18x = 58.17 × 29.23
4. Step 4: Simplify right side
   42.18x = 1,700.31
5. Step 5: Solve for x
   x = 1,700.31/42.18
6. Step 6: Final answer
   x = 40.31