Finding the Third Proportional to 21,960 and 42,813

Step by Step Solution

1. Step 1: Write the proportion equation
   21,960 : 42,813 = 42,813 : x
2. Step 2: Convert to fraction form
   21,960/42,813 = 42,813/x
3. Step 3: Cross multiply
   21,960x = 42,813 × 42,813
4. Step 4: Simplify right side
   21,960x = 1,832,952,969
5. Step 5: Solve for x
   x = 1,832,952,969/21,960
6. Step 6: Final answer
   x = 83,467.80