Finding the Third Proportional to 42,310 and 90,451

Step by Step Solution

1. Step 1: Write the proportion equation
   42,310 : 90,451 = 90,451 : x
2. Step 2: Convert to fraction form
   42,310/90,451 = 90,451/x
3. Step 3: Cross multiply
   42,310x = 90,451 × 90,451
4. Step 4: Simplify right side
   42,310x = 8,181,383,401
5. Step 5: Solve for x
   x = 8,181,383,401/42,310
6. Step 6: Final answer
   x = 193,367.61