Finding the Fourth Proportional to 42.79, 64.15 and 29.29

Step by Step Solution

1. Step 1: Write the proportion equation
   42.79 : 64.15 = 29.29 : x
2. Step 2: Convert to fraction form
   42.79/64.15 = 29.29/x
3. Step 3: Cross multiply
   42.79x = 64.15 × 29.29
4. Step 4: Simplify right side
   42.79x = 1,878.72
5. Step 5: Solve for x
   x = 1,878.72/42.79
6. Step 6: Final answer
   x = 43.91