Finding the Third Proportional to 68,176.50 and 139,736.25

Step by Step Solution

1. Step 1: Write the proportion equation
   68,176.50 : 139,736.25 = 139,736.25 : x
2. Step 2: Convert to fraction form
   68,176.50/139,736.25 = 139,736.25/x
3. Step 3: Cross multiply
   68,176.50x = 139,736.25 × 139,736.25
4. Step 4: Simplify right side
   68,176.50x = 19,526,219,564.06
5. Step 5: Solve for x
   x = 19,526,219,564.06/68,176.50
6. Step 6: Final answer
   x = 286,406.89