Finding the Third Proportional to 68,815.50 and 145,902

Step by Step Solution

1. Step 1: Write the proportion equation
   68,815.50 : 145,902 = 145,902 : x
2. Step 2: Convert to fraction form
   68,815.50/145,902 = 145,902/x
3. Step 3: Cross multiply
   68,815.50x = 145,902 × 145,902
4. Step 4: Simplify right side
   68,815.50x = 21,287,393,604
5. Step 5: Solve for x
   x = 21,287,393,604/68,815.50
6. Step 6: Final answer
   x = 309,340.10