Finding the Third Proportional to 19,171.69 and 38,890.13

Step by Step Solution

1. Step 1: Write the proportion equation
   19,171.69 : 38,890.13 = 38,890.13 : x
2. Step 2: Convert to fraction form
   19,171.69/38,890.13 = 38,890.13/x
3. Step 3: Cross multiply
   19,171.69x = 38,890.13 × 38,890.13
4. Step 4: Simplify right side
   19,171.69x = 1,512,441,822.52
5. Step 5: Solve for x
   x = 1,512,441,822.52/19,171.69
6. Step 6: Final answer
   x = 78,889.34