Finding the Third Proportional to 19,486 and 42,086

Step by Step Solution

1. Step 1: Write the proportion equation
   19,486 : 42,086 = 42,086 : x
2. Step 2: Convert to fraction form
   19,486/42,086 = 42,086/x
3. Step 3: Cross multiply
   19,486x = 42,086 × 42,086
4. Step 4: Simplify right side
   19,486x = 1,771,231,396
5. Step 5: Solve for x
   x = 1,771,231,396/19,486
6. Step 6: Final answer
   x = 90,897.64