Finding the Third Proportional to 21.02 and 43.63

Step by Step Solution

1. Step 1: Write the proportion equation
   21.02 : 43.63 = 43.63 : x
2. Step 2: Convert to fraction form
   21.02/43.63 = 43.63/x
3. Step 3: Cross multiply
   21.02x = 43.63 × 43.63
4. Step 4: Simplify right side
   21.02x = 1,903.48
5. Step 5: Solve for x
   x = 1,903.48/21.02
6. Step 6: Final answer
   x = 90.54