Finding the Third Proportional to 21,613 and 31,591

Step by Step Solution

1. Step 1: Write the proportion equation
   21,613 : 31,591 = 31,591 : x
2. Step 2: Convert to fraction form
   21,613/31,591 = 31,591/x
3. Step 3: Cross multiply
   21,613x = 31,591 × 31,591
4. Step 4: Simplify right side
   21,613x = 997,991,281
5. Step 5: Solve for x
   x = 997,991,281/21,613
6. Step 6: Final answer
   x = 46,175.51