Finding the Third Proportional to 39,282 and 72,819

Step by Step Solution

1. Step 1: Write the proportion equation
   39,282 : 72,819 = 72,819 : x
2. Step 2: Convert to fraction form
   39,282/72,819 = 72,819/x
3. Step 3: Cross multiply
   39,282x = 72,819 × 72,819
4. Step 4: Simplify right side
   39,282x = 5,302,606,761
5. Step 5: Solve for x
   x = 5,302,606,761/39,282
6. Step 6: Final answer
   x = 134,988.21