Finding the Third Proportional to 51,609.75 and 72,678.38

Step by Step Solution

1. Step 1: Write the proportion equation
   51,609.75 : 72,678.38 = 72,678.38 : x
2. Step 2: Convert to fraction form
   51,609.75/72,678.38 = 72,678.38/x
3. Step 3: Cross multiply
   51,609.75x = 72,678.38 × 72,678.38
4. Step 4: Simplify right side
   51,609.75x = 5,282,146,192.64
5. Step 5: Solve for x
   x = 5,282,146,192.64/51,609.75
6. Step 6: Final answer
   x = 102,347.84