Finding the Fourth Proportional to 42.25, 63.32 and 21.94

Step by Step Solution

1. Step 1: Write the proportion equation
   42.25 : 63.32 = 21.94 : x
2. Step 2: Convert to fraction form
   42.25/63.32 = 21.94/x
3. Step 3: Cross multiply
   42.25x = 63.32 × 21.94
4. Step 4: Simplify right side
   42.25x = 1,389.21
5. Step 5: Solve for x
   x = 1,389.21/42.25
6. Step 6: Final answer
   x = 32.88