Finding the Third Proportional to 21,410 and 28,408

Step by Step Solution

1. Step 1: Write the proportion equation
   21,410 : 28,408 = 28,408 : x
2. Step 2: Convert to fraction form
   21,410/28,408 = 28,408/x
3. Step 3: Cross multiply
   21,410x = 28,408 × 28,408
4. Step 4: Simplify right side
   21,410x = 807,014,464
5. Step 5: Solve for x
   x = 807,014,464/21,410
6. Step 6: Final answer
   x = 37,693.34