Finding the Third Proportional to 68,803.50 and 139,543.50

Step by Step Solution

1. Step 1: Write the proportion equation
   68,803.50 : 139,543.50 = 139,543.50 : x
2. Step 2: Convert to fraction form
   68,803.50/139,543.50 = 139,543.50/x
3. Step 3: Cross multiply
   68,803.50x = 139,543.50 × 139,543.50
4. Step 4: Simplify right side
   68,803.50x = 19,472,388,392.25
5. Step 5: Solve for x
   x = 19,472,388,392.25/68,803.50
6. Step 6: Final answer
   x = 283,014.50