Finding the Third Proportional to 10,988 and 21,436

Step by Step Solution

1. Step 1: Write the proportion equation
   10,988 : 21,436 = 21,436 : x
2. Step 2: Convert to fraction form
   10,988/21,436 = 21,436/x
3. Step 3: Cross multiply
   10,988x = 21,436 × 21,436
4. Step 4: Simplify right side
   10,988x = 459,502,096
5. Step 5: Solve for x
   x = 459,502,096/10,988
6. Step 6: Final answer
   x = 41,818.54