Finding the Third Proportional to 68,807.50 and 139,551.50

Step by Step Solution

1. Step 1: Write the proportion equation
   68,807.50 : 139,551.50 = 139,551.50 : x
2. Step 2: Convert to fraction form
   68,807.50/139,551.50 = 139,551.50/x
3. Step 3: Cross multiply
   68,807.50x = 139,551.50 × 139,551.50
4. Step 4: Simplify right side
   68,807.50x = 19,474,621,152.25
5. Step 5: Solve for x
   x = 19,474,621,152.25/68,807.50
6. Step 6: Final answer
   x = 283,030.50