Finding the Third Proportional to 39,807.56 and 51,661.69

Step by Step Solution

1. Step 1: Write the proportion equation
   39,807.56 : 51,661.69 = 51,661.69 : x
2. Step 2: Convert to fraction form
   39,807.56/51,661.69 = 51,661.69/x
3. Step 3: Cross multiply
   39,807.56x = 51,661.69 × 51,661.69
4. Step 4: Simplify right side
   39,807.56x = 2,668,929,955.35
5. Step 5: Solve for x
   x = 2,668,929,955.35/39,807.56
6. Step 6: Final answer
   x = 67,045.80