Finding the Third Proportional to 68,216.50 and 139,814

Step by Step Solution

1. Step 1: Write the proportion equation
   68,216.50 : 139,814 = 139,814 : x
2. Step 2: Convert to fraction form
   68,216.50/139,814 = 139,814/x
3. Step 3: Cross multiply
   68,216.50x = 139,814 × 139,814
4. Step 4: Simplify right side
   68,216.50x = 19,547,954,596
5. Step 5: Solve for x
   x = 19,547,954,596/68,216.50
6. Step 6: Final answer
   x = 286,557.57