Finding the Third Proportional to 42,396 and 90,636

Step by Step Solution

1. Step 1: Write the proportion equation
   42,396 : 90,636 = 90,636 : x
2. Step 2: Convert to fraction form
   42,396/90,636 = 90,636/x
3. Step 3: Cross multiply
   42,396x = 90,636 × 90,636
4. Step 4: Simplify right side
   42,396x = 8,214,884,496
5. Step 5: Solve for x
   x = 8,214,884,496/42,396
6. Step 6: Final answer
   x = 193,765.56