Finding the Third Proportional to 21,818 and 34,131

Step by Step Solution

1. Step 1: Write the proportion equation
   21,818 : 34,131 = 34,131 : x
2. Step 2: Convert to fraction form
   21,818/34,131 = 34,131/x
3. Step 3: Cross multiply
   21,818x = 34,131 × 34,131
4. Step 4: Simplify right side
   21,818x = 1,164,925,161
5. Step 5: Solve for x
   x = 1,164,925,161/21,818
6. Step 6: Final answer
   x = 53,392.85