Finding the Third Proportional to 67,085 and 139,615

Step by Step Solution

1. Step 1: Write the proportion equation
   67,085 : 139,615 = 139,615 : x
2. Step 2: Convert to fraction form
   67,085/139,615 = 139,615/x
3. Step 3: Cross multiply
   67,085x = 139,615 × 139,615
4. Step 4: Simplify right side
   67,085x = 19,492,348,225
5. Step 5: Solve for x
   x = 19,492,348,225/67,085
6. Step 6: Final answer
   x = 290,561.95