Finding the Third Proportional to 67,356 and 139,086

Step by Step Solution

1. Step 1: Write the proportion equation
   67,356 : 139,086 = 139,086 : x
2. Step 2: Convert to fraction form
   67,356/139,086 = 139,086/x
3. Step 3: Cross multiply
   67,356x = 139,086 × 139,086
4. Step 4: Simplify right side
   67,356x = 19,344,915,396
5. Step 5: Solve for x
   x = 19,344,915,396/67,356
6. Step 6: Final answer
   x = 287,204.04