Finding the Third Proportional to 21,404 and 31,486

Step by Step Solution

1. Step 1: Write the proportion equation
   21,404 : 31,486 = 31,486 : x
2. Step 2: Convert to fraction form
   21,404/31,486 = 31,486/x
3. Step 3: Cross multiply
   21,404x = 31,486 × 31,486
4. Step 4: Simplify right side
   21,404x = 991,368,196
5. Step 5: Solve for x
   x = 991,368,196/21,404
6. Step 6: Final answer
   x = 46,316.96