Finding the Third Proportional to 42,018 and 90,408

Step by Step Solution

1. Step 1: Write the proportion equation
   42,018 : 90,408 = 90,408 : x
2. Step 2: Convert to fraction form
   42,018/90,408 = 90,408/x
3. Step 3: Cross multiply
   42,018x = 90,408 × 90,408
4. Step 4: Simplify right side
   42,018x = 8,173,606,464
5. Step 5: Solve for x
   x = 8,173,606,464/42,018
6. Step 6: Final answer
   x = 194,526.31