Finding the Third Proportional to 39,399.75 and 53,079.75

Step by Step Solution

1. Step 1: Write the proportion equation
   39,399.75 : 53,079.75 = 53,079.75 : x
2. Step 2: Convert to fraction form
   39,399.75/53,079.75 = 53,079.75/x
3. Step 3: Cross multiply
   39,399.75x = 53,079.75 × 53,079.75
4. Step 4: Simplify right side
   39,399.75x = 2,817,459,860.06
5. Step 5: Solve for x
   x = 2,817,459,860.06/39,399.75
6. Step 6: Final answer
   x = 71,509.59