Finding the Third Proportional to 67,075.50 and 139,659

Step by Step Solution

1. Step 1: Write the proportion equation
   67,075.50 : 139,659 = 139,659 : x
2. Step 2: Convert to fraction form
   67,075.50/139,659 = 139,659/x
3. Step 3: Cross multiply
   67,075.50x = 139,659 × 139,659
4. Step 4: Simplify right side
   67,075.50x = 19,504,636,281
5. Step 5: Solve for x
   x = 19,504,636,281/67,075.50
6. Step 6: Final answer
   x = 290,786.30