Finding the Third Proportional to 21,427 and 43,898

Step by Step Solution

1. Step 1: Write the proportion equation
   21,427 : 43,898 = 43,898 : x
2. Step 2: Convert to fraction form
   21,427/43,898 = 43,898/x
3. Step 3: Cross multiply
   21,427x = 43,898 × 43,898
4. Step 4: Simplify right side
   21,427x = 1,927,034,404
5. Step 5: Solve for x
   x = 1,927,034,404/21,427
6. Step 6: Final answer
   x = 89,934.87