Finding the Third Proportional to 30,408 and 45,490

Step by Step Solution

1. Step 1: Write the proportion equation
   30,408 : 45,490 = 45,490 : x
2. Step 2: Convert to fraction form
   30,408/45,490 = 45,490/x
3. Step 3: Cross multiply
   30,408x = 45,490 × 45,490
4. Step 4: Simplify right side
   30,408x = 2,069,340,100
5. Step 5: Solve for x
   x = 2,069,340,100/30,408
6. Step 6: Final answer
   x = 68,052.49