Finding the Third Proportional to 21,026 and 43,240

Step by Step Solution

1. Step 1: Write the proportion equation
   21,026 : 43,240 = 43,240 : x
2. Step 2: Convert to fraction form
   21,026/43,240 = 43,240/x
3. Step 3: Cross multiply
   21,026x = 43,240 × 43,240
4. Step 4: Simplify right side
   21,026x = 1,869,697,600
5. Step 5: Solve for x
   x = 1,869,697,600/21,026
6. Step 6: Final answer
   x = 88,923.12