Finding the Third Proportional to 19,171.69 and 39,907.69

Step by Step Solution

1. Step 1: Write the proportion equation
   19,171.69 : 39,907.69 = 39,907.69 : x
2. Step 2: Convert to fraction form
   19,171.69/39,907.69 = 39,907.69/x
3. Step 3: Cross multiply
   19,171.69x = 39,907.69 × 39,907.69
4. Step 4: Simplify right side
   19,171.69x = 1,592,623,521.60
5. Step 5: Solve for x
   x = 1,592,623,521.60/19,171.69
6. Step 6: Final answer
   x = 83,071.64