Finding the Third Proportional to 39,358.50 and 72,979.50

Step by Step Solution

1. Step 1: Write the proportion equation
   39,358.50 : 72,979.50 = 72,979.50 : x
2. Step 2: Convert to fraction form
   39,358.50/72,979.50 = 72,979.50/x
3. Step 3: Cross multiply
   39,358.50x = 72,979.50 × 72,979.50
4. Step 4: Simplify right side
   39,358.50x = 5,326,007,420.25
5. Step 5: Solve for x
   x = 5,326,007,420.25/39,358.50
6. Step 6: Final answer
   x = 135,320.39