Finding the Third Proportional to 19,786 and 42,145

Step by Step Solution

1. Step 1: Write the proportion equation
   19,786 : 42,145 = 42,145 : x
2. Step 2: Convert to fraction form
   19,786/42,145 = 42,145/x
3. Step 3: Cross multiply
   19,786x = 42,145 × 42,145
4. Step 4: Simplify right side
   19,786x = 1,776,201,025
5. Step 5: Solve for x
   x = 1,776,201,025/19,786
6. Step 6: Final answer
   x = 89,770.60