Finding the Fourth Proportional to 42.82, 64.31 and 29.99

Step by Step Solution

1. Step 1: Write the proportion equation
   42.82 : 64.31 = 29.99 : x
2. Step 2: Convert to fraction form
   42.82/64.31 = 29.99/x
3. Step 3: Cross multiply
   42.82x = 64.31 × 29.99
4. Step 4: Simplify right side
   42.82x = 1,928.67
5. Step 5: Solve for x
   x = 1,928.67/42.82
6. Step 6: Final answer
   x = 45.04