Finding the Third Proportional to 21,490 and 34,515

Step by Step Solution

1. Step 1: Write the proportion equation
   21,490 : 34,515 = 34,515 : x
2. Step 2: Convert to fraction form
   21,490/34,515 = 34,515/x
3. Step 3: Cross multiply
   21,490x = 34,515 × 34,515
4. Step 4: Simplify right side
   21,490x = 1,191,285,225
5. Step 5: Solve for x
   x = 1,191,285,225/21,490
6. Step 6: Final answer
   x = 55,434.40