Finding the Third Proportional to 42,039 and 91,611

Step by Step Solution

1. Step 1: Write the proportion equation
   42,039 : 91,611 = 91,611 : x
2. Step 2: Convert to fraction form
   42,039/91,611 = 91,611/x
3. Step 3: Cross multiply
   42,039x = 91,611 × 91,611
4. Step 4: Simplify right side
   42,039x = 8,392,575,321
5. Step 5: Solve for x
   x = 8,392,575,321/42,039
6. Step 6: Final answer
   x = 199,637.84