Finding the Third Proportional to 68,809.50 and 142,338.56

Step by Step Solution

1. Step 1: Write the proportion equation
   68,809.50 : 142,338.56 = 142,338.56 : x
2. Step 2: Convert to fraction form
   68,809.50/142,338.56 = 142,338.56/x
3. Step 3: Cross multiply
   68,809.50x = 142,338.56 × 142,338.56
4. Step 4: Simplify right side
   68,809.50x = 20,260,266,374.57
5. Step 5: Solve for x
   x = 20,260,266,374.57/68,809.50
6. Step 6: Final answer
   x = 294,439.96