Finding the Third Proportional to 20,418 and 42,114

Step by Step Solution

1. Step 1: Write the proportion equation
   20,418 : 42,114 = 42,114 : x
2. Step 2: Convert to fraction form
   20,418/42,114 = 42,114/x
3. Step 3: Cross multiply
   20,418x = 42,114 × 42,114
4. Step 4: Simplify right side
   20,418x = 1,773,588,996
5. Step 5: Solve for x
   x = 1,773,588,996/20,418
6. Step 6: Final answer
   x = 86,863.99